405655560 has 64 divisors (see below), whose sum is σ = 1352188800. Its totient is φ = 108174528.

The previous prime is 405655559. The next prime is 405655597. The reversal of 405655560 is 65556504.

It is a happy number.

405655560 is a `hidden beast` number, since 40 + 5 + 6 + 55 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186724 + ... + 188883.

It is an arithmetic number, because the mean of its divisors is an integer number (21127950).

Almost surely, 2^405655560 is an apocalyptic number.

405655560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405655560 is an abundant number, since it is smaller than the sum of its proper divisors (946533240).

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

405655560 is a wasteful number, since it uses less digits than its factorization.

405655560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375627 (or 375617 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 405655560 is about 20140.8927309591. The cubic root of 405655560 is about 740.2626046311.

The spelling of 405655560 in words is "four hundred five million, six hundred fifty-five thousand, five hundred sixty".