405504690 has 16 divisors (see below), whose sum is σ = 973211328. Its totient is φ = 108134576.

The previous prime is 405504683. The next prime is 405504713. The reversal of 405504690 is 96405504.

It is a super-2 number, since 2×405504690² = 328868107223992200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6758382 + ... + 6758441.

It is an arithmetic number, because the mean of its divisors is an integer number (60825708).

Almost surely, 2^405504690 is an apocalyptic number.

405504690 is an abundant number, since it is smaller than the sum of its proper divisors (567706638).

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

405504690 is a wasteful number, since it uses less digits than its factorization.

405504690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13516833.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 405504690 is about 20137.1470173905. The cubic root of 405504690 is about 740.1708212902.

The spelling of 405504690 in words is "four hundred five million, five hundred four thousand, six hundred ninety".