72407888 has 30 divisors (see below), whose sum is σ = 163196586. Its totient is φ = 31031616.

The previous prime is 72407873. The next prime is 72407893. The reversal of 72407888 is 88870427.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 65480464 + 6927424 = 8092^2 + 2632^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45395 + ... + 46962.

Almost surely, 2^72407888 is an apocalyptic number.

It is an amenable number.

72407888 is an abundant number, since it is smaller than the sum of its proper divisors (90788698).

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

72407888 is a wasteful number, since it uses less digits than its factorization.

72407888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92379 (or 92366 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 44.

The square root of 72407888 is about 8509.2824609364. The cubic root of 72407888 is about 416.8008795017.

The spelling of 72407888 in words is "seventy-two million, four hundred seven thousand, eight hundred eighty-eight".