390499392 has 56 divisors (see below), whose sum is σ = 1035864832. Its totient is φ = 129830400.

The previous prime is 390499391. The next prime is 390499397. The reversal of 390499392 is 293994093.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (390499391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78417 + ... + 83247.

Almost surely, 2^390499392 is an apocalyptic number.

390499392 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390499392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (517932416).

390499392 is an abundant number, since it is smaller than the sum of its proper divisors (645365440).

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

390499392 is a wasteful number, since it uses less digits than its factorization.

390499392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5267 (or 5257 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 48.

The square root of 390499392 is about 19761.0574615834. The cubic root of 390499392 is about 730.9260730825.

The spelling of 390499392 in words is "three hundred ninety million, four hundred ninety-nine thousand, three hundred ninety-two".