400577472 has 42 divisors (see below), whose sum is σ = 1148184648. Its totient is φ = 133525632.

The previous prime is 400577461. The next prime is 400577473. The reversal of 400577472 is 274775004.

It is a happy number.

400577472 is a `hidden beast` number, since 40 + 0 + 577 + 47 + 2 = 666.

It is a super-2 number, since 2×400577472² = 320924622147821568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400577473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 347148 + ... + 348299.

Almost surely, 2^400577472 is an apocalyptic number.

It is an amenable number.

400577472 is an abundant number, since it is smaller than the sum of its proper divisors (747607176).

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

400577472 is a wasteful number, since it uses less digits than its factorization.

400577472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695465 (or 695452 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 36.

The square root of 400577472 is about 20014.4315932279. The cubic root of 400577472 is about 737.1607000755.

The spelling of 400577472 in words is "four hundred million, five hundred seventy-seven thousand, four hundred seventy-two".