72140780 has 24 divisors (see below), whose sum is σ = 151865280. Its totient is φ = 28785920.

The previous prime is 72140773. The next prime is 72140801. The reversal of 72140780 is 8704127.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4436 + ... + 12804.

It is an arithmetic number, because the mean of its divisors is an integer number (6327720).

Almost surely, 2^72140780 is an apocalyptic number.

It is an amenable number.

72140780 is an abundant number, since it is smaller than the sum of its proper divisors (79724500).

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

72140780 is a wasteful number, since it uses less digits than its factorization.

72140780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8809 (or 8807 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 72140780 is about 8493.5728642309. The cubic root of 72140780 is about 416.2877308606.

The spelling of 72140780 in words is "seventy-two million, one hundred forty thousand, seven hundred eighty".