72446139 has 12 divisors (see below), whose sum is σ = 107197272. Its totient is φ = 47119200.

The previous prime is 72446137. The next prime is 72446173. The reversal of 72446139 is 93164427.

It is not a de Polignac number, because 72446139 - 2¹ = 72446137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72446131) 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 11 ways as a sum of consecutive naturals, for example, 97797 + ... + 98534.

It is an arithmetic number, because the mean of its divisors is an integer number (8933106).

Almost surely, 2^72446139 is an apocalyptic number.

72446139 is a deficient number, since it is larger than the sum of its proper divisors (34751133).

72446139 is a wasteful number, since it uses less digits than its factorization.

72446139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196378 (or 196375 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 72446139 is about 8511.5297684964. The cubic root of 72446139 is about 416.8742612114.

The spelling of 72446139 in words is "seventy-two million, four hundred forty-six thousand, one hundred thirty-nine".