400680825 has 24 divisors (see below), whose sum is σ = 665457408. Its totient is φ = 212729280.

The previous prime is 400680779. The next prime is 400680829. The reversal of 400680825 is 528086004.

It is not a de Polignac number, because 400680825 - 2⁷ = 400680697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400680829) 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 23 ways as a sum of consecutive naturals, for example, 4747 + ... + 28703.

It is an arithmetic number, because the mean of its divisors is an integer number (27727392).

Almost surely, 2^400680825 is an apocalyptic number.

It is an amenable number.

400680825 is a deficient number, since it is larger than the sum of its proper divisors (264776583).

400680825 is a wasteful number, since it uses less digits than its factorization.

400680825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24193 (or 24188 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 400680825 is about 20017.0133886152. The cubic root of 400680825 is about 737.2240929051.

The spelling of 400680825 in words is "four hundred million, six hundred eighty thousand, eight hundred twenty-five".