400334636 has 72 divisors (see below), whose sum is σ = 811641600. Its totient is φ = 172186560.

The previous prime is 400334591. The next prime is 400334639. The reversal of 400334636 is 636433004.

It is a junction number, because it is equal to n+sod(n) for n = 400334599 and 400334608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400334639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 911705 + ... + 912143.

It is an arithmetic number, because the mean of its divisors is an integer number (11272800).

Almost surely, 2^400334636 is an apocalyptic number.

It is an amenable number.

400334636 is an abundant number, since it is smaller than the sum of its proper divisors (411306964).

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

400334636 is a wasteful number, since it uses less digits than its factorization.

400334636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 29.

The square root of 400334636 is about 20008.3641510244. The cubic root of 400334636 is about 737.0117107179.

The spelling of 400334636 in words is "four hundred million, three hundred thirty-four thousand, six hundred thirty-six".