31906098 has 48 divisors (see below), whose sum is σ = 79649856. Its totient is φ = 9041760.

The previous prime is 31906057. The next prime is 31906103. The reversal of 31906098 is 89060913.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15540 + ... + 17472.

It is an arithmetic number, because the mean of its divisors is an integer number (1659372).

Almost surely, 2^31906098 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31906098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39824928).

31906098 is an abundant number, since it is smaller than the sum of its proper divisors (47743758).

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

31906098 is a wasteful number, since it uses less digits than its factorization.

31906098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079 (or 2076 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 31906098 is about 5648.5483090791. The cubic root of 31906098 is about 317.1693641972.

The spelling of 31906098 in words is "thirty-one million, nine hundred six thousand, ninety-eight".