1399052655 has 480 divisors, whose sum is σ = 3754175040. Its totient is φ = 487710720.

The previous prime is 1399052651. The next prime is 1399052729. The reversal of 1399052655 is 5562509931.

1399052655 is a `hidden beast` number, since 1 + 39 + 90 + 526 + 5 + 5 = 666.

It is not a de Polignac number, because 1399052655 - 2² = 1399052651 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1399052655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399052651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 48243181 + ... + 48243209.

It is an arithmetic number, because the mean of its divisors is an integer number (7821198).

Almost surely, 2^1399052655 is an apocalyptic number.

1399052655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1399052655 is an abundant number, since it is smaller than the sum of its proper divisors (2355122385).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1399052655 is a wasteful number, since it uses less digits than its factorization.

1399052655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 364500, while the sum is 45.

The square root of 1399052655 is about 37403.9122953736. The cubic root of 1399052655 is about 1118.4365555316.

The spelling of 1399052655 in words is "one billion, three hundred ninety-nine million, fifty-two thousand, six hundred fifty-five".