390490435491 has 32 divisors (see below), whose sum is σ = 578855897088. Its totient is φ = 232524241920.

The previous prime is 390490435471. The next prime is 390490435493. The reversal of 390490435491 is 194534094093.

It is not a de Polignac number, because 390490435491 - 2⁶ = 390490435427 is a prime.

It is a super-2 number, since 2×390490435491² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (390490435493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20999500 + ... + 21018086.

It is an arithmetic number, because the mean of its divisors is an integer number (18089246784).

Almost surely, 2^390490435491 is an apocalyptic number.

390490435491 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

390490435491 is a deficient number, since it is larger than the sum of its proper divisors (188365461597).

390490435491 is a wasteful number, since it uses less digits than its factorization.

390490435491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36011.

The product of its (nonzero) digits is 2099520, while the sum is 51.

The spelling of 390490435491 in words is "three hundred ninety billion, four hundred ninety million, four hundred thirty-five thousand, four hundred ninety-one".