400303156 has 12 divisors (see below), whose sum is σ = 764215200. Its totient is φ = 181955960.

The previous prime is 400303151. The next prime is 400303171. The reversal of 400303156 is 651303004.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400303151) 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, 4548856 + ... + 4548943.

It is an arithmetic number, because the mean of its divisors is an integer number (63684600).

Almost surely, 2^400303156 is an apocalyptic number.

400303156 is the 10695-th centered heptagonal number.

It is an amenable number.

400303156 is a deficient number, since it is larger than the sum of its proper divisors (363912044).

400303156 is a wasteful number, since it uses less digits than its factorization.

400303156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9097814 (or 9097812 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 400303156 is about 20007.5774645508. The cubic root of 400303156 is about 736.9923920990.

The spelling of 400303156 in words is "four hundred million, three hundred three thousand, one hundred fifty-six".