400312616 has 32 divisors (see below), whose sum is σ = 819979200. Its totient is φ = 181703040.

The previous prime is 400312589. The next prime is 400312639. The reversal of 400312616 is 616213004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400312591 and 400312600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68381 + ... + 74003.

It is an arithmetic number, because the mean of its divisors is an integer number (25624350).

Almost surely, 2^400312616 is an apocalyptic number.

It is an amenable number.

400312616 is an abundant number, since it is smaller than the sum of its proper divisors (419666584).

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

400312616 is a wasteful number, since it uses less digits than its factorization.

400312616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6449 (or 6445 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 400312616 is about 20007.8138735845. The cubic root of 400312616 is about 736.9981976100.

The spelling of 400312616 in words is "four hundred million, three hundred twelve thousand, six hundred sixteen".