31963998 has 16 divisors (see below), whose sum is σ = 69739776. Its totient is φ = 9686040.

The previous prime is 31963991. The next prime is 31964027. The reversal of 31963998 is 89936913.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31963991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242086 + ... + 242217.

It is an arithmetic number, because the mean of its divisors is an integer number (4358736).

Almost surely, 2^31963998 is an apocalyptic number.

31963998 is an abundant number, since it is smaller than the sum of its proper divisors (37775778).

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

31963998 is a wasteful number, since it uses less digits than its factorization.

31963998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484319.

The product of its digits is 314928, while the sum is 48.

The square root of 31963998 is about 5653.6711966650. The cubic root of 31963998 is about 317.3611040220.

The spelling of 31963998 in words is "thirty-one million, nine hundred sixty-three thousand, nine hundred ninety-eight".