5631906 has 16 divisors (see below), whose sum is σ = 12873024. Its totient is φ = 1609104.

The previous prime is 5631893. The next prime is 5631911. The reversal of 5631906 is 6091365.

It is a happy number.

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, 67005 + ... + 67088.

It is an arithmetic number, because the mean of its divisors is an integer number (804564).

Almost surely, 2^5631906 is an apocalyptic number.

5631906 is an abundant number, since it is smaller than the sum of its proper divisors (7241118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5631906 is a wasteful number, since it uses less digits than its factorization.

5631906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134105.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 5631906 is about 2373.1637111670. The cubic root of 5631906 is about 177.9174174004.

The spelling of 5631906 in words is "five million, six hundred thirty-one thousand, nine hundred six".