72920841 has 32 divisors (see below), whose sum is σ = 117734400. Its totient is φ = 39216960.

The previous prime is 72920831. The next prime is 72920843. The reversal of 72920841 is 14802927.

It is a happy number.

It is not a de Polignac number, because 72920841 - 2⁹ = 72920329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72920843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70911 + ... + 71931.

It is an arithmetic number, because the mean of its divisors is an integer number (3679200).

Almost surely, 2^72920841 is an apocalyptic number.

It is an amenable number.

72920841 is a deficient number, since it is larger than the sum of its proper divisors (44813559).

72920841 is a wasteful number, since it uses less digits than its factorization.

72920841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 72920841 is about 8539.3700587338. The cubic root of 72920841 is about 417.7828000194.

The spelling of 72920841 in words is "seventy-two million, nine hundred twenty thousand, eight hundred forty-one".