31275396 has 60 divisors (see below), whose sum is σ = 82816272. Its totient is φ = 10290672.

The previous prime is 31275367. The next prime is 31275407. The reversal of 31275396 is 69357213.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 31275396.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 26311 + ... + 27473.

Almost surely, 2^31275396 is an apocalyptic number.

31275396 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31275396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41408136).

31275396 is an abundant number, since it is smaller than the sum of its proper divisors (51540876).

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

31275396 is a wasteful number, since it uses less digits than its factorization.

31275396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262 (or 1251 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 31275396 is about 5592.4409697376. The cubic root of 31275396 is about 315.0655645836.

The spelling of 31275396 in words is "thirty-one million, two hundred seventy-five thousand, three hundred ninety-six".