72406615 has 8 divisors (see below), whose sum is σ = 89007408. Its totient is φ = 56512320.

The previous prime is 72406613. The next prime is 72406643. The reversal of 72406615 is 51660427.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72406615 - 2¹ = 72406613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72406613) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 176397 + ... + 176806.

It is an arithmetic number, because the mean of its divisors is an integer number (11125926).

Almost surely, 2^72406615 is an apocalyptic number.

72406615 is a deficient number, since it is larger than the sum of its proper divisors (16600793).

72406615 is a wasteful number, since it uses less digits than its factorization.

72406615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353249.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 72406615 is about 8509.2076599411. The cubic root of 72406615 is about 416.7984369012.

The spelling of 72406615 in words is "seventy-two million, four hundred six thousand, six hundred fifteen".