72013418 has 8 divisors (see below), whose sum is σ = 108293412. Its totient is φ = 35915616.

The previous prime is 72013399. The next prime is 72013427. The reversal of 72013418 is 81431027.

It can be written as a sum of positive squares in 2 ways, for example, as 63091249 + 8922169 = 7943^2 + 2987^2 .

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

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, 44555 + ... + 46142.

Almost surely, 2^72013418 is an apocalyptic number.

72013418 is a deficient number, since it is larger than the sum of its proper divisors (36279994).

72013418 is a wasteful number, since it uses less digits than its factorization.

72013418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91096.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 72013418 is about 8486.0720006373. The cubic root of 72013418 is about 416.0426061207.

The spelling of 72013418 in words is "seventy-two million, thirteen thousand, four hundred eighteen".