403056660 has 96 divisors (see below), whose sum is σ = 1148660352. Its totient is φ = 105587200.

The previous prime is 403056659. The next prime is 403056697. The reversal of 403056660 is 66650304.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1375474 + ... + 1375766.

It is an arithmetic number, because the mean of its divisors is an integer number (11965212).

Almost surely, 2^403056660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 403056660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (574330176).

403056660 is an abundant number, since it is smaller than the sum of its proper divisors (745603692).

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

403056660 is a wasteful number, since it uses less digits than its factorization.

403056660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 403056660 is about 20076.2710681043. The cubic root of 403056660 is about 738.6783445778.

The spelling of 403056660 in words is "four hundred three million, fifty-six thousand, six hundred sixty".