400235616 has 72 divisors (see below), whose sum is σ = 1241649864. Its totient is φ = 121282560.

The previous prime is 400235611. The next prime is 400235639. The reversal of 400235616 is 616532004.

400235616 is a `hidden beast` number, since 40 + 0 + 2 + 3 + 5 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 400235616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400235611) 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, 60001 + ... + 66336.

It is an arithmetic number, because the mean of its divisors is an integer number (17245137).

Almost surely, 2^400235616 is an apocalyptic number.

It is an amenable number.

400235616 is an abundant number, since it is smaller than the sum of its proper divisors (841414248).

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

400235616 is a wasteful number, since it uses less digits than its factorization.

400235616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126364 (or 126353 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 400235616 is about 20005.8895328351. The cubic root of 400235616 is about 736.9509407929.

The spelling of 400235616 in words is "four hundred million, two hundred thirty-five thousand, six hundred sixteen".