401138506 has 32 divisors (see below), whose sum is σ = 628689600. Its totient is φ = 191817600.

The previous prime is 401138453. The next prime is 401138533. The reversal of 401138506 is 605831104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1149220 + ... + 1149568.

It is an arithmetic number, because the mean of its divisors is an integer number (19646550).

Almost surely, 2^401138506 is an apocalyptic number.

401138506 is a deficient number, since it is larger than the sum of its proper divisors (227551094).

401138506 is a wasteful number, since it uses less digits than its factorization.

401138506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 401138506 is about 20028.4424257105. The cubic root of 401138506 is about 737.5046862098.

The spelling of 401138506 in words is "four hundred one million, one hundred thirty-eight thousand, five hundred six".