401384637 has 12 divisors (see below), whose sum is σ = 613882620. Its totient is φ = 251849088.

The previous prime is 401384591. The next prime is 401384639. The reversal of 401384637 is 736483104.

401384637 is a `hidden beast` number, since 4 + 0 + 13 + 8 + 4 + 637 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 353026521 + 48358116 = 18789^2 + 6954^2 .

It is not a de Polignac number, because 401384637 - 2⁶ = 401384573 is a prime.

It is a super-2 number, since 2×401384637² = 322219253639243538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401384639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1311562 + ... + 1311867.

It is an arithmetic number, because the mean of its divisors is an integer number (51156885).

Almost surely, 2^401384637 is an apocalyptic number.

It is an amenable number.

401384637 is a deficient number, since it is larger than the sum of its proper divisors (212497983).

401384637 is a wasteful number, since it uses less digits than its factorization.

401384637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623452 (or 2623449 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 401384637 is about 20034.5860201802. The cubic root of 401384637 is about 737.6554950115.

The spelling of 401384637 in words is "four hundred one million, three hundred eighty-four thousand, six hundred thirty-seven".