401615636 has 12 divisors (see below), whose sum is σ = 703098228. Its totient is φ = 200730432.

The previous prime is 401615629. The next prime is 401615663. The reversal of 401615636 is 636516104.

It can be written as a sum of positive squares in 2 ways, for example, as 285407236 + 116208400 = 16894^2 + 10780^2 .

It is a super-2 number, since 2×401615636² = 322590238159368992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6761 + ... + 29136.

It is an arithmetic number, because the mean of its divisors is an integer number (58591519).

Almost surely, 2^401615636 is an apocalyptic number.

It is an amenable number.

401615636 is a deficient number, since it is larger than the sum of its proper divisors (301482592).

401615636 is a wasteful number, since it uses less digits than its factorization.

401615636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38698 (or 38696 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 401615636 is about 20040.3501965410. The cubic root of 401615636 is about 737.7969760982.

The spelling of 401615636 in words is "four hundred one million, six hundred fifteen thousand, six hundred thirty-six".