400145472 has 84 divisors (see below), whose sum is σ = 1207343280. Its totient is φ = 126358272.

The previous prime is 400145437. The next prime is 400145483. The reversal of 400145472 is 274541004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7338 + ... + 29225.

Almost surely, 2^400145472 is an apocalyptic number.

It is an amenable number.

400145472 is an abundant number, since it is smaller than the sum of its proper divisors (807197808).

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

400145472 is a wasteful number, since it uses less digits than its factorization.

400145472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36600 (or 36587 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 400145472 is about 20003.6364694023. The cubic root of 400145472 is about 736.8956094739.

Adding to 400145472 its reverse (274541004), we get a palindrome (674686476).

The spelling of 400145472 in words is "four hundred million, one hundred forty-five thousand, four hundred seventy-two".