402171172 has 24 divisors (see below), whose sum is σ = 763483896. Its totient is φ = 184259328.

The previous prime is 402171149. The next prime is 402171191. The reversal of 402171172 is 271171204.

It can be written as a sum of positive squares in 4 ways, for example, as 31069476 + 371101696 = 5574^2 + 19264^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21103 + ... + 35350.

It is an arithmetic number, because the mean of its divisors is an integer number (31811829).

Almost surely, 2^402171172 is an apocalyptic number.

It is an amenable number.

402171172 is a deficient number, since it is larger than the sum of its proper divisors (361312724).

402171172 is a wasteful number, since it uses less digits than its factorization.

402171172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56607 (or 56605 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 402171172 is about 20054.2058431642. The cubic root of 402171172 is about 738.1370059704.

The spelling of 402171172 in words is "four hundred two million, one hundred seventy-one thousand, one hundred seventy-two".