72148391 has 16 divisors (see below), whose sum is σ = 87588864. Its totient is φ = 58015104.

The previous prime is 72148387. The next prime is 72148393. The reversal of 72148391 is 19384127.

It is not a de Polignac number, because 72148391 - 2² = 72148387 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 (72148393) 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, 44786 + ... + 46368.

It is an arithmetic number, because the mean of its divisors is an integer number (5474304).

Almost surely, 2^72148391 is an apocalyptic number.

72148391 is a deficient number, since it is larger than the sum of its proper divisors (15440473).

72148391 is a wasteful number, since it uses less digits than its factorization.

72148391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990.

The product of its digits is 12096, while the sum is 35.

The square root of 72148391 is about 8494.0208970781. The cubic root of 72148391 is about 416.3023700818.

The spelling of 72148391 in words is "seventy-two million, one hundred forty-eight thousand, three hundred ninety-one".