400660275 has 48 divisors (see below), whose sum is σ = 687098880. Its totient is φ = 205795200.

The previous prime is 400660243. The next prime is 400660303. The reversal of 400660275 is 572066004.

It is not a de Polignac number, because 400660275 - 2⁵ = 400660243 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 904204 + ... + 904646.

It is an arithmetic number, because the mean of its divisors is an integer number (14314560).

Almost surely, 2^400660275 is an apocalyptic number.

400660275 is a deficient number, since it is larger than the sum of its proper divisors (286438605).

400660275 is a wasteful number, since it uses less digits than its factorization.

400660275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 871 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 400660275 is about 20016.5000686933. The cubic root of 400660275 is about 737.2114891790.

It can be divided in two parts, 400 and 660275, that added together give a triangular number (660675 = T₁₁₄₉).

The spelling of 400660275 in words is "four hundred million, six hundred sixty thousand, two hundred seventy-five".