401090638 has 16 divisors (see below), whose sum is σ = 653022720. Its totient is φ = 183659616.

The previous prime is 401090633. The next prime is 401090647. The reversal of 401090638 is 836090104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401090633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57433 + ... + 64036.

It is an arithmetic number, because the mean of its divisors is an integer number (40813920).

Almost surely, 2^401090638 is an apocalyptic number.

401090638 is a deficient number, since it is larger than the sum of its proper divisors (251932082).

401090638 is a wasteful number, since it uses less digits than its factorization.

401090638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121611.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 401090638 is about 20027.2473894941. The cubic root of 401090638 is about 737.4753494777.

The spelling of 401090638 in words is "four hundred one million, ninety thousand, six hundred thirty-eight".