402439648 has 48 divisors (see below), whose sum is σ = 890368416. Its totient is φ = 177661440.

The previous prime is 402439637. The next prime is 402439673. The reversal of 402439648 is 846934204.

It is a self number, because there is not a number n which added to its sum of digits gives 402439648.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11463 + ... + 30598.

It is an arithmetic number, because the mean of its divisors is an integer number (18549342).

Almost surely, 2^402439648 is an apocalyptic number.

It is an amenable number.

402439648 is an abundant number, since it is smaller than the sum of its proper divisors (487928768).

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

402439648 is a wasteful number, since it uses less digits than its factorization.

402439648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42107 (or 42099 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 402439648 is about 20060.8984843651. The cubic root of 402439648 is about 738.3012212791.

The spelling of 402439648 in words is "four hundred two million, four hundred thirty-nine thousand, six hundred forty-eight".