402038478 has 20 divisors (see below), whose sum is σ = 900864360. Its totient is φ = 134012772.

The previous prime is 402038401. The next prime is 402038489. The reversal of 402038478 is 874830204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1240698 + ... + 1241021.

It is an arithmetic number, because the mean of its divisors is an integer number (45043218).

Almost surely, 2^402038478 is an apocalyptic number.

402038478 is an abundant number, since it is smaller than the sum of its proper divisors (498825882).

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

402038478 is a wasteful number, since it uses less digits than its factorization.

402038478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481733 (or 2481724 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 402038478 is about 20050.8971869091. The cubic root of 402038478 is about 738.0558157269.

The spelling of 402038478 in words is "four hundred two million, thirty-eight thousand, four hundred seventy-eight".