400156616 has 16 divisors (see below), whose sum is σ = 776166300. Its totient is φ = 193178944.

The previous prime is 400156613. The next prime is 400156621. The reversal of 400156616 is 616651004.

It can be written as a sum of positive squares in 2 ways, for example, as 399600100 + 556516 = 19990^2 + 746^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (400156613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862175 + ... + 862638.

Almost surely, 2^400156616 is an apocalyptic number.

It is an amenable number.

400156616 is a deficient number, since it is larger than the sum of its proper divisors (376009684).

400156616 is a wasteful number, since it uses less digits than its factorization.

400156616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724848 (or 1724844 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 400156616 is about 20003.9150168161. The cubic root of 400156616 is about 736.9024502264.

The spelling of 400156616 in words is "four hundred million, one hundred fifty-six thousand, six hundred sixteen".