1321824390 has 16 divisors (see below), whose sum is σ = 3172378608. Its totient is φ = 352486496.

The previous prime is 1321824389. The next prime is 1321824391. The reversal of 1321824390 is 934281231.

It is an interprime number because it is at equal distance from previous prime (1321824389) and next prime (1321824391).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321824391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22030377 + ... + 22030436.

It is an arithmetic number, because the mean of its divisors is an integer number (198273663).

Almost surely, 2^1321824390 is an apocalyptic number.

1321824390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321824390 is an abundant number, since it is smaller than the sum of its proper divisors (1850554218).

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

1321824390 is a wasteful number, since it uses less digits than its factorization.

1321824390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44060823.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1321824390 is about 36356.9029209035. The cubic root of 1321824390 is about 1097.4664528985.

The spelling of 1321824390 in words is "one billion, three hundred twenty-one million, eight hundred twenty-four thousand, three hundred ninety".