72920540 has 48 divisors (see below), whose sum is σ = 190923264. Its totient is φ = 22728000.

The previous prime is 72920501. The next prime is 72920543. The reversal of 72920540 is 4502927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72920543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22136 + ... + 25215.

It is an arithmetic number, because the mean of its divisors is an integer number (3977568).

Almost surely, 2^72920540 is an apocalyptic number.

72920540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72920540 is an abundant number, since it is smaller than the sum of its proper divisors (118002724).

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

72920540 is a wasteful number, since it uses less digits than its factorization.

72920540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47378 (or 47376 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 72920540 is about 8539.3524344648. The cubic root of 72920540 is about 417.7822251824.

The spelling of 72920540 in words is "seventy-two million, nine hundred twenty thousand, five hundred forty".