400642315 has 8 divisors (see below), whose sum is σ = 509051520. Its totient is φ = 301660032.

The previous prime is 400642289. The next prime is 400642367. The reversal of 400642315 is 513246004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400642315 - 2⁹ = 400641803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400642315.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2356635 + ... + 2356804.

It is an arithmetic number, because the mean of its divisors is an integer number (63631440).

Almost surely, 2^400642315 is an apocalyptic number.

400642315 is a deficient number, since it is larger than the sum of its proper divisors (108409205).

400642315 is a wasteful number, since it uses less digits than its factorization.

400642315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4713461.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 400642315 is about 20016.0514337868. The cubic root of 400642315 is about 737.2004735988.

Adding to 400642315 its reverse (513246004), we get a palindrome (913888319).

The spelling of 400642315 in words is "four hundred million, six hundred forty-two thousand, three hundred fifteen".