31242804 has 24 divisors (see below), whose sum is σ = 77188608. Its totient is φ = 9801600.

The previous prime is 31242793. The next prime is 31242833. The reversal of 31242804 is 40824213.

It is a super-2 number, since 2×31242804² = 1952225603564832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76372 + ... + 76779.

It is an arithmetic number, because the mean of its divisors is an integer number (3216192).

Almost surely, 2^31242804 is an apocalyptic number.

31242804 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31242804 is an abundant number, since it is smaller than the sum of its proper divisors (45945804).

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

31242804 is a wasteful number, since it uses less digits than its factorization.

31242804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153175 (or 153173 counting only the distinct ones).

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

The square root of 31242804 is about 5589.5262768861. The cubic root of 31242804 is about 314.9560835727.

The spelling of 31242804 in words is "thirty-one million, two hundred forty-two thousand, eight hundred four".