72424740 has 24 divisors (see below), whose sum is σ = 202789440. Its totient is φ = 19313248.

The previous prime is 72424691. The next prime is 72424763. The reversal of 72424740 is 4742427.

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 = 72424698 and 72424707.

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, 603480 + ... + 603599.

It is an arithmetic number, because the mean of its divisors is an integer number (8449560).

Almost surely, 2^72424740 is an apocalyptic number.

It is an amenable number.

72424740 is an abundant number, since it is smaller than the sum of its proper divisors (130364700).

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

72424740 is a wasteful number, since it uses less digits than its factorization.

72424740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207091 (or 1207089 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 30.

The square root of 72424740 is about 8510.2726160799. The cubic root of 72424740 is about 416.8332119993.

The spelling of 72424740 in words is "seventy-two million, four hundred twenty-four thousand, seven hundred forty".