72981860 has 24 divisors (see below), whose sum is σ = 175156800. Its totient is φ = 25022304.

The previous prime is 72981847. The next prime is 72981863. The reversal of 72981860 is 6818927.

It is not an unprimeable number, because it can be changed into a prime (72981863) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 260510 + ... + 260789.

It is an arithmetic number, because the mean of its divisors is an integer number (7298200).

Almost surely, 2^72981860 is an apocalyptic number.

72981860 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72981860 is an abundant number, since it is smaller than the sum of its proper divisors (102174940).

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

72981860 is a wasteful number, since it uses less digits than its factorization.

72981860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521315 (or 521313 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 72981860 is about 8542.9421161565. The cubic root of 72981860 is about 417.8992988648.

The spelling of 72981860 in words is "seventy-two million, nine hundred eighty-one thousand, eight hundred sixty".