400428650 has 12 divisors (see below), whose sum is σ = 744797382. Its totient is φ = 160171440.

The previous prime is 400428641. The next prime is 400428697. The reversal of 400428650 is 56824004.

It can be written as a sum of positive squares in 3 ways, for example, as 167469481 + 232959169 = 12941^2 + 15263^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4004237 + ... + 4004336.

Almost surely, 2^400428650 is an apocalyptic number.

400428650 is a deficient number, since it is larger than the sum of its proper divisors (344368732).

400428650 is a wasteful number, since it uses less digits than its factorization.

400428650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8008585 (or 8008580 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 400428650 is about 20010.7133805869. The cubic root of 400428650 is about 737.0693991195.

The spelling of 400428650 in words is "four hundred million, four hundred twenty-eight thousand, six hundred fifty".