31634490 has 16 divisors (see below), whose sum is σ = 75922848. Its totient is φ = 8435856.

The previous prime is 31634483. The next prime is 31634497. The reversal of 31634490 is 9443613.

It is an interprime number because it is at equal distance from previous prime (31634483) and next prime (31634497).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1054483 = 31634490 / (3 + 1 + 6 + 3 + 4 + 4 + 9 + 0).

It is not an unprimeable number, because it can be changed into a prime (31634497) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 527212 + ... + 527271.

It is an arithmetic number, because the mean of its divisors is an integer number (4745178).

Almost surely, 2^31634490 is an apocalyptic number.

31634490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31634490 is an abundant number, since it is smaller than the sum of its proper divisors (44288358).

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

31634490 is a wasteful number, since it uses less digits than its factorization.

31634490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054493.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 31634490 is about 5624.4546402296. The cubic root of 31634490 is about 316.2668058580.

The spelling of 31634490 in words is "thirty-one million, six hundred thirty-four thousand, four hundred ninety".