403655560 has 128 divisors (see below), whose sum is σ = 1146700800. Its totient is φ = 124220160.

The previous prime is 403655501. The next prime is 403655563. The reversal of 403655560 is 65556304.

It is a super-2 number, since 2×403655560² = 325875622237827200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (403655563) 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, 254851 + ... + 256429.

It is an arithmetic number, because the mean of its divisors is an integer number (8958600).

Almost surely, 2^403655560 is an apocalyptic number.

403655560 is a gapful number since it is divisible by the number (40) 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 403655560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (573350400).

403655560 is an abundant number, since it is smaller than the sum of its proper divisors (743045240).

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

403655560 is a wasteful number, since it uses less digits than its factorization.

403655560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 34.

The square root of 403655560 is about 20091.1811499474. The cubic root of 403655560 is about 739.0440297431.

The spelling of 403655560 in words is "four hundred three million, six hundred fifty-five thousand, five hundred sixty".