31961406 has 8 divisors (see below), whose sum is σ = 63922824. Its totient is φ = 10653800.

The previous prime is 31961399. The next prime is 31961429. The reversal of 31961406 is 60416913.

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

31961406 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2663445 + ... + 2663456.

It is an arithmetic number, because the mean of its divisors is an integer number (7990353).

Almost surely, 2^31961406 is an apocalyptic number.

31961406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31961406 is a wasteful number, since it uses less digits than its factorization.

31961406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326906.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 31961406 is about 5653.4419604344. The cubic root of 31961406 is about 317.3525253891.

The spelling of 31961406 in words is "thirty-one million, nine hundred sixty-one thousand, four hundred six".