724417020 has 72 divisors (see below), whose sum is σ = 2278798704. Its totient is φ = 193176576.

The previous prime is 724417007. The next prime is 724417027. The reversal of 724417020 is 20714427.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (724417027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69669 + ... + 79388.

It is an arithmetic number, because the mean of its divisors is an integer number (31649982).

Almost surely, 2^724417020 is an apocalyptic number.

It is an amenable number.

724417020 is an abundant number, since it is smaller than the sum of its proper divisors (1554381684).

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

724417020 is a wasteful number, since it uses less digits than its factorization.

724417020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149081 (or 149067 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 724417020 is about 26914.9961917144. The cubic root of 724417020 is about 898.1100339206.

The spelling of 724417020 in words is "seven hundred twenty-four million, four hundred seventeen thousand, twenty".