72550740 has 96 divisors (see below), whose sum is σ = 223211520. Its totient is φ = 17525376.

The previous prime is 72550739. The next prime is 72550769. The reversal of 72550740 is 4705527.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 72550698 and 72550707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24837 + ... + 27603.

It is an arithmetic number, because the mean of its divisors is an integer number (2325120).

Almost surely, 2^72550740 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 72550740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111605760).

72550740 is an abundant number, since it is smaller than the sum of its proper divisors (150660780).

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

72550740 is a wasteful number, since it uses less digits than its factorization.

72550740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821 (or 2819 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 72550740 is about 8517.6722172199. The cubic root of 72550740 is about 417.0747986751.

The spelling of 72550740 in words is "seventy-two million, five hundred fifty thousand, seven hundred forty".