72547420 has 24 divisors (see below), whose sum is σ = 166200048. Its totient is φ = 26380800.

The previous prime is 72547411. The next prime is 72547421. The reversal of 72547420 is 2474527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72547421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164661 + ... + 165100.

It is an arithmetic number, because the mean of its divisors is an integer number (6925002).

Almost surely, 2^72547420 is an apocalyptic number.

It is an amenable number.

72547420 is an abundant number, since it is smaller than the sum of its proper divisors (93652628).

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

72547420 is a wasteful number, since it uses less digits than its factorization.

72547420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329781 (or 329779 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 72547420 is about 8517.4773260632. The cubic root of 72547420 is about 417.0684366474.

The spelling of 72547420 in words is "seventy-two million, five hundred forty-seven thousand, four hundred twenty".