72379980 has 144 divisors (see below), whose sum is σ = 232805664. Its totient is φ = 18869760.

The previous prime is 72379939. The next prime is 72379981. The reversal of 72379980 is 8997327.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (72379981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 257440 + ... + 257720.

It is an arithmetic number, because the mean of its divisors is an integer number (1616706).

Almost surely, 2^72379980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72379980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116402832).

72379980 is an abundant number, since it is smaller than the sum of its proper divisors (160425684).

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

72379980 is a wasteful number, since it uses less digits than its factorization.

72379980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 72379980 is about 8507.6424466476. The cubic root of 72379980 is about 416.7473237634.

The spelling of 72379980 in words is "seventy-two million, three hundred seventy-nine thousand, nine hundred eighty".