31490300 has 18 divisors (see below), whose sum is σ = 68334168. Its totient is φ = 12596080.

The previous prime is 31490299. The next prime is 31490323. The reversal of 31490300 is 309413.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 157352 + ... + 157551.

Almost surely, 2^31490300 is an apocalyptic number.

It is an amenable number.

31490300 is an abundant number, since it is smaller than the sum of its proper divisors (36843868).

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

31490300 is a wasteful number, since it uses less digits than its factorization.

31490300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314917 (or 314910 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 31490300 is about 5611.6218689431. The cubic root of 31490300 is about 315.7855592595.

Adding to 31490300 its reverse (309413), we get a palindrome (31799713).

The spelling of 31490300 in words is "thirty-one million, four hundred ninety thousand, three hundred".