400871625 has 64 divisors (see below), whose sum is σ = 831707136. Its totient is φ = 166584000.

The previous prime is 400871573. The next prime is 400871641. The reversal of 400871625 is 526178004.

It is not a de Polignac number, because 400871625 - 2⁶ = 400871561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21934 + ... + 35816.

It is an arithmetic number, because the mean of its divisors is an integer number (12995424).

Almost surely, 2^400871625 is an apocalyptic number.

It is an amenable number.

400871625 is an abundant number, since it is smaller than the sum of its proper divisors (430835511).

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

400871625 is a wasteful number, since it uses less digits than its factorization.

400871625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13919 (or 13909 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 400871625 is about 20021.7787671326. The cubic root of 400871625 is about 737.3410937919.

The spelling of 400871625 in words is "four hundred million, eight hundred seventy-one thousand, six hundred twenty-five".