400830915 has 16 divisors (see below), whose sum is σ = 641577888. Its totient is φ = 213693696.

The previous prime is 400830893. The next prime is 400830919. The reversal of 400830915 is 519038004.

It is not a de Polignac number, because 400830915 - 2⁸ = 400830659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400830919) 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, 71287 + ... + 76703.

It is an arithmetic number, because the mean of its divisors is an integer number (40098618).

Almost surely, 2^400830915 is an apocalyptic number.

400830915 is a deficient number, since it is larger than the sum of its proper divisors (240746973).

400830915 is a wasteful number, since it uses less digits than its factorization.

400830915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10358.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 400830915 is about 20020.7620983818. The cubic root of 400830915 is about 737.3161330395.

Adding to 400830915 its reverse (519038004), we get a palindrome (919868919).

The spelling of 400830915 in words is "four hundred million, eight hundred thirty thousand, nine hundred fifteen".