1390279732842 has 256 divisors, whose sum is σ = 3935163617280. Its totient is φ = 315361382400.

The previous prime is 1390279732811. The next prime is 1390279732843. The reversal of 1390279732842 is 2482379720931.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (1390279732843) 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 127 ways as a sum of consecutive naturals, for example, 88202242 + ... + 88218002.

It is an arithmetic number, because the mean of its divisors is an integer number (15371732880).

Almost surely, 2^{1390279732842} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390279732842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1967581808640).

1390279732842 is an abundant number, since it is smaller than the sum of its proper divisors (2544883884438).

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

1390279732842 is a wasteful number, since it uses less digits than its factorization.

1390279732842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16589.

The product of its (nonzero) digits is 9144576, while the sum is 57.

The spelling of 1390279732842 in words is "one trillion, three hundred ninety billion, two hundred seventy-nine million, seven hundred thirty-two thousand, eight hundred forty-two".