403256664 has 64 divisors (see below), whose sum is σ = 1123430400. Its totient is φ = 134026272.

The previous prime is 403256593. The next prime is 403256669. The reversal of 403256664 is 466652304.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403256669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76729 + ... + 81815.

It is an arithmetic number, because the mean of its divisors is an integer number (17553600).

Almost surely, 2^403256664 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 403256664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (561715200).

403256664 is an abundant number, since it is smaller than the sum of its proper divisors (720173736).

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

403256664 is a wasteful number, since it uses less digits than its factorization.

403256664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5469 (or 5459 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 403256664 is about 20081.2515546218. The cubic root of 403256664 is about 738.8005062225.

The spelling of 403256664 in words is "four hundred three million, two hundred fifty-six thousand, six hundred sixty-four".