31424208 has 20 divisors (see below), whose sum is σ = 81179328. Its totient is φ = 10474720.

The previous prime is 31424207. The next prime is 31424221. The reversal of 31424208 is 80242413.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31424203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327288 + ... + 327383.

Almost surely, 2^31424208 is an apocalyptic number.

It is an amenable number.

31424208 is an abundant number, since it is smaller than the sum of its proper divisors (49755120).

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

31424208 is a wasteful number, since it uses less digits than its factorization.

31424208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654682 (or 654676 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 31424208 is about 5605.7299257099. The cubic root of 31424208 is about 315.5644804135.

The spelling of 31424208 in words is "thirty-one million, four hundred twenty-four thousand, two hundred eight".