402871590 has 64 divisors (see below), whose sum is σ = 1171998720. Its totient is φ = 97665120.

The previous prime is 402871571. The next prime is 402871591. The reversal of 402871590 is 95178204.

402871590 is a `hidden beast` number, since 40 + 28 + 7 + 1 + 590 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402871591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64854 + ... + 70793.

It is an arithmetic number, because the mean of its divisors is an integer number (18312480).

Almost surely, 2^402871590 is an apocalyptic number.

402871590 is an abundant number, since it is smaller than the sum of its proper divisors (769127130).

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

402871590 is a wasteful number, since it uses less digits than its factorization.

402871590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135674 (or 135668 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 402871590 is about 20071.6613662148. The cubic root of 402871590 is about 738.5652685566.

The spelling of 402871590 in words is "four hundred two million, eight hundred seventy-one thousand, five hundred ninety".