400690635 has 8 divisors (see below), whose sum is σ = 641105040. Its totient is φ = 213701664.

The previous prime is 400690621. The next prime is 400690669. The reversal of 400690635 is 536096004.

It is a happy number.

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

It is not a de Polignac number, because 400690635 - 2⁵ = 400690603 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400690596 and 400690605.

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, 13356340 + ... + 13356369.

It is an arithmetic number, because the mean of its divisors is an integer number (80138130).

Almost surely, 2^400690635 is an apocalyptic number.

400690635 is a deficient number, since it is larger than the sum of its proper divisors (240414405).

400690635 is a wasteful number, since it uses less digits than its factorization.

400690635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26712717.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 400690635 is about 20017.2584286660. The cubic root of 400690635 is about 737.2301094224.

The spelling of 400690635 in words is "four hundred million, six hundred ninety thousand, six hundred thirty-five".