401257902 has 16 divisors (see below), whose sum is σ = 849722832. Its totient is φ = 125884800.

The previous prime is 401257889. The next prime is 401257973. The reversal of 401257902 is 209752104.

It is a super-2 number, since 2×401257902² = 322015807834883208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401257902.

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, 1966849 + ... + 1967052.

It is an arithmetic number, because the mean of its divisors is an integer number (53107677).

Almost surely, 2^401257902 is an apocalyptic number.

401257902 is an abundant number, since it is smaller than the sum of its proper divisors (448464930).

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

401257902 is a wasteful number, since it uses less digits than its factorization.

401257902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933923.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 401257902 is about 20031.4228650887. The cubic root of 401257902 is about 737.5778499453.

The spelling of 401257902 in words is "four hundred one million, two hundred fifty-seven thousand, nine hundred two".