72873620 has 12 divisors (see below), whose sum is σ = 153034644. Its totient is φ = 29149440.

The previous prime is 72873613. The next prime is 72873631. The reversal of 72873620 is 2637827.

It can be written as a sum of positive squares in 2 ways, for example, as 18645124 + 54228496 = 4318^2 + 7364^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1821821 + ... + 1821860.

It is an arithmetic number, because the mean of its divisors is an integer number (12752887).

Almost surely, 2^72873620 is an apocalyptic number.

It is an amenable number.

72873620 is an abundant number, since it is smaller than the sum of its proper divisors (80161024).

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

72873620 is a wasteful number, since it uses less digits than its factorization.

72873620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643690 (or 3643688 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 72873620 is about 8536.6047114763. The cubic root of 72873620 is about 417.6926000104.

The spelling of 72873620 in words is "seventy-two million, eight hundred seventy-three thousand, six hundred twenty".