405616992 has 48 divisors (see below), whose sum is σ = 1161542592. Its totient is φ = 122913920.

The previous prime is 405616973. The next prime is 405617021. The reversal of 405616992 is 299616504.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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, 190998 + ... + 193109.

It is an arithmetic number, because the mean of its divisors is an integer number (24198804).

Almost surely, 2^405616992 is an apocalyptic number.

It is an amenable number.

405616992 is an abundant number, since it is smaller than the sum of its proper divisors (755925600).

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

405616992 is a wasteful number, since it uses less digits than its factorization.

405616992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384131 (or 384123 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 405616992 is about 20139.9352531233. The cubic root of 405616992 is about 740.2391435508.

The spelling of 405616992 in words is "four hundred five million, six hundred sixteen thousand, nine hundred ninety-two".