31616394 has 8 divisors (see below), whose sum is σ = 63232800. Its totient is φ = 10538796.

The previous prime is 31616393. The next prime is 31616401. The reversal of 31616394 is 49361613.

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

31616394 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (31616393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2634694 + ... + 2634705.

It is an arithmetic number, because the mean of its divisors is an integer number (7904100).

Almost surely, 2^31616394 is an apocalyptic number.

31616394 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.

31616394 is a wasteful number, since it uses less digits than its factorization.

31616394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269404.

The product of its digits is 11664, while the sum is 33.

The square root of 31616394 is about 5622.8457208072. The cubic root of 31616394 is about 316.2064892464.

The spelling of 31616394 in words is "thirty-one million, six hundred sixteen thousand, three hundred ninety-four".