72278484 has 48 divisors (see below), whose sum is σ = 174913536. Its totient is φ = 23205600.

The previous prime is 72278477. The next prime is 72278491. The reversal of 72278484 is 48487227.

It is an interprime number because it is at equal distance from previous prime (72278477) and next prime (72278491).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 122839 + ... + 123425.

It is an arithmetic number, because the mean of its divisors is an integer number (3644032).

Almost surely, 2^72278484 is an apocalyptic number.

It is an amenable number.

72278484 is an abundant number, since it is smaller than the sum of its proper divisors (102635052).

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

72278484 is a wasteful number, since it uses less digits than its factorization.

72278484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956 (or 954 counting only the distinct ones).

The product of its digits is 200704, while the sum is 42.

The square root of 72278484 is about 8501.6753643032. The cubic root of 72278484 is about 416.5524357438.

The spelling of 72278484 in words is "seventy-two million, two hundred seventy-eight thousand, four hundred eighty-four".