400723625 has 8 divisors (see below), whose sum is σ = 500103240. Its totient is φ = 320578800.

The previous prime is 400723621. The next prime is 400723679. The reversal of 400723625 is 526327004.

It can be written as a sum of positive squares in 4 ways, for example, as 2202256 + 398521369 = 1484^2 + 19963^2 .

It is not a de Polignac number, because 400723625 - 2² = 400723621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400723621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1602770 + ... + 1603019.

It is an arithmetic number, because the mean of its divisors is an integer number (62512905).

Almost surely, 2^400723625 is an apocalyptic number.

It is an amenable number.

400723625 is a deficient number, since it is larger than the sum of its proper divisors (99379615).

400723625 is an equidigital number, since it uses as much as digits as its factorization.

400723625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205804 (or 3205794 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 400723625 is about 20018.0824506245. The cubic root of 400723625 is about 737.2503416180.

The spelling of 400723625 in words is "four hundred million, seven hundred twenty-three thousand, six hundred twenty-five".