400613816 has 48 divisors (see below), whose sum is σ = 791077560. Its totient is φ = 190175040.

The previous prime is 400613813. The next prime is 400613833. The reversal of 400613816 is 618316004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400613813) 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, 765731 + ... + 766253.

Almost surely, 2^400613816 is an apocalyptic number.

400613816 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

400613816 is a deficient number, since it is larger than the sum of its proper divisors (390463744).

400613816 is a wasteful number, since it uses less digits than its factorization.

400613816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 400613816 is about 20015.3395174801. The cubic root of 400613816 is about 737.1829933563.

The spelling of 400613816 in words is "four hundred million, six hundred thirteen thousand, eight hundred sixteen".