400924985 has 16 divisors (see below), whose sum is σ = 513998400. Its totient is φ = 299318976.

The previous prime is 400924981. The next prime is 400924987. The reversal of 400924985 is 589429004.

It is a cyclic number.

It is not a de Polignac number, because 400924985 - 2² = 400924981 is a prime.

It is a super-3 number, since 3×400924985³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (400924981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25130 + ... + 37859.

It is an arithmetic number, because the mean of its divisors is an integer number (32124900).

Almost surely, 2^400924985 is an apocalyptic number.

It is an amenable number.

400924985 is a deficient number, since it is larger than the sum of its proper divisors (113073415).

400924985 is a wasteful number, since it uses less digits than its factorization.

400924985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63080.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 400924985 is about 20023.1112717280. Note that the first 3 decimals coincide. The cubic root of 400924985 is about 737.3738081513.

The spelling of 400924985 in words is "four hundred million, nine hundred twenty-four thousand, nine hundred eighty-five".