72708415 has 16 divisors (see below), whose sum is σ = 95100768. Its totient is φ = 53041536.

The previous prime is 72708413. The next prime is 72708437. The reversal of 72708415 is 51480727.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72708415 - 2¹ = 72708413 is a prime.

It is a super-2 number, since 2×72708415² = 10573027223624450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72708413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1344 + ... + 12133.

It is an arithmetic number, because the mean of its divisors is an integer number (5943798).

Almost surely, 2^72708415 is an apocalyptic number.

72708415 is a deficient number, since it is larger than the sum of its proper divisors (22392353).

72708415 is a wasteful number, since it uses less digits than its factorization.

72708415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13578.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 72708415 is about 8526.9229502793. The cubic root of 72708415 is about 417.3767238555.

The spelling of 72708415 in words is "seventy-two million, seven hundred eight thousand, four hundred fifteen".