400535428 has 12 divisors (see below), whose sum is σ = 737828560. Its totient is φ = 189727272.

The previous prime is 400535423. The next prime is 400535441. The reversal of 400535428 is 824535004.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 400535428.

It is not an unprimeable number, because it can be changed into a prime (400535423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2635026 + ... + 2635177.

Almost surely, 2^400535428 is an apocalyptic number.

It is an amenable number.

400535428 is a deficient number, since it is larger than the sum of its proper divisors (337293132).

400535428 is a wasteful number, since it uses less digits than its factorization.

400535428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5270226 (or 5270224 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 400535428 is about 20013.3812235714. The cubic root of 400535428 is about 737.1349087525.

The spelling of 400535428 in words is "four hundred million, five hundred thirty-five thousand, four hundred twenty-eight".