72949240 has 128 divisors (see below), whose sum is σ = 206640000. Its totient is φ = 23030784.

The previous prime is 72949223. The next prime is 72949243. The reversal of 72949240 is 4294927.

It is a self number, because there is not a number n which added to its sum of digits gives 72949240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72949243) 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, 178156 + ... + 178564.

It is an arithmetic number, because the mean of its divisors is an integer number (1614375).

Almost surely, 2^72949240 is an apocalyptic number.

72949240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72949240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103320000).

72949240 is an abundant number, since it is smaller than the sum of its proper divisors (133690760).

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

72949240 is a wasteful number, since it uses less digits than its factorization.

72949240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 72949240 is about 8541.0327244426. The cubic root of 72949240 is about 417.8370281097.

The spelling of 72949240 in words is "seventy-two million, nine hundred forty-nine thousand, two hundred forty".