31949898 has 32 divisors (see below), whose sum is σ = 67239936. Its totient is φ = 10101168.

The previous prime is 31949867. The next prime is 31949899. The reversal of 31949898 is 89894913.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31949898.

It is not an unprimeable number, because it can be changed into a prime (31949899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16615 + ... + 18437.

It is an arithmetic number, because the mean of its divisors is an integer number (2101248).

Almost surely, 2^31949898 is an apocalyptic number.

31949898 is an abundant number, since it is smaller than the sum of its proper divisors (35290038).

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

31949898 is a wasteful number, since it uses less digits than its factorization.

31949898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1978.

The product of its digits is 559872, while the sum is 51.

The square root of 31949898 is about 5652.4240817547. The cubic root of 31949898 is about 317.3144322456.

The spelling of 31949898 in words is "thirty-one million, nine hundred forty-nine thousand, eight hundred ninety-eight".