400735216 has 40 divisors (see below), whose sum is σ = 888848864. Its totient is φ = 171452160.

The previous prime is 400735183. The next prime is 400735219. The reversal of 400735216 is 612537004.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400735219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71326 + ... + 76738.

Almost surely, 2^400735216 is an apocalyptic number.

It is an amenable number.

400735216 is an abundant number, since it is smaller than the sum of its proper divisors (488113648).

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

400735216 is a wasteful number, since it uses less digits than its factorization.

400735216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6089 (or 6083 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 400735216 is about 20018.3719617755. The cubic root of 400735216 is about 737.2574499139.

The spelling of 400735216 in words is "four hundred million, seven hundred thirty-five thousand, two hundred sixteen".