402397632 has 280 divisors, whose sum is σ = 1469822816. Its totient is φ = 106002432.

The previous prime is 402397609. The next prime is 402397651. The reversal of 402397632 is 236793204.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 471318 + ... + 472170.

Almost surely, 2^402397632 is an apocalyptic number.

402397632 is a gapful number since it is divisible by the number (42) 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 402397632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734911408).

402397632 is an abundant number, since it is smaller than the sum of its proper divisors (1067425184).

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

402397632 is a wasteful number, since it uses less digits than its factorization.

402397632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 402397632 is about 20059.8512457097. The cubic root of 402397632 is about 738.2755267070.

The spelling of 402397632 in words is "four hundred two million, three hundred ninety-seven thousand, six hundred thirty-two".