402587478 has 12 divisors (see below), whose sum is σ = 872272908. Its totient is φ = 134195820.

The previous prime is 402587459. The next prime is 402587501. The reversal of 402587478 is 874785204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11182968 + ... + 11183003.

It is an arithmetic number, because the mean of its divisors is an integer number (72689409).

Almost surely, 2^402587478 is an apocalyptic number.

402587478 is an abundant number, since it is smaller than the sum of its proper divisors (469685430).

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

402587478 is a wasteful number, since it uses less digits than its factorization.

402587478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22365979 (or 22365976 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 45.

The square root of 402587478 is about 20064.5826769460. The cubic root of 402587478 is about 738.3916114025.

The spelling of 402587478 in words is "four hundred two million, five hundred eighty-seven thousand, four hundred seventy-eight".