402656064 has 112 divisors (see below), whose sum is σ = 1094768448. Its totient is φ = 130572288.

The previous prime is 402656063. The next prime is 402656069. The reversal of 402656064 is 460656204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402656063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1453494 + ... + 1453770.

Almost surely, 2^402656064 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 402656064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547384224).

402656064 is an abundant number, since it is smaller than the sum of its proper divisors (692112384).

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

402656064 is a wasteful number, since it uses less digits than its factorization.

402656064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 402656064 is about 20066.2917351463. The cubic root of 402656064 is about 738.4335405518.

The spelling of 402656064 in words is "four hundred two million, six hundred fifty-six thousand, sixty-four".