31246020 has 96 divisors (see below), whose sum is σ = 104711040. Its totient is φ = 7689600.

The previous prime is 31246009. The next prime is 31246037. The reversal of 31246020 is 2064213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31245984 and 31246002.

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 31 ways as a sum of consecutive naturals, for example, 4795 + ... + 9245.

It is an arithmetic number, because the mean of its divisors is an integer number (1090740).

Almost surely, 2^31246020 is an apocalyptic number.

31246020 is a gapful number since it is divisible by the number (30) 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 31246020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52355520).

31246020 is an abundant number, since it is smaller than the sum of its proper divisors (73465020).

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

31246020 is a wasteful number, since it uses less digits than its factorization.

31246020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482 (or 4474 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31246020 is about 5589.8139503923. The cubic root of 31246020 is about 314.9668899439.

It can be divided in two parts, 31 and 246020, that added together give a triangular number (246051 = T₇₀₁).

The spelling of 31246020 in words is "thirty-one million, two hundred forty-six thousand, twenty".