72547120 has 20 divisors (see below), whose sum is σ = 168672240. Its totient is φ = 29018816.

The previous prime is 72547091. The next prime is 72547133. The reversal of 72547120 is 2174527.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453340 + ... + 453499.

It is an arithmetic number, because the mean of its divisors is an integer number (8433612).

Almost surely, 2^72547120 is an apocalyptic number.

It is an amenable number.

72547120 is an abundant number, since it is smaller than the sum of its proper divisors (96125120).

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

72547120 is a wasteful number, since it uses less digits than its factorization.

72547120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906852 (or 906846 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 72547120 is about 8517.4597151968. The cubic root of 72547120 is about 417.0678617558.

The spelling of 72547120 in words is "seventy-two million, five hundred forty-seven thousand, one hundred twenty".