72473457 has 16 divisors (see below), whose sum is σ = 110556032. Its totient is φ = 41368320.

The previous prime is 72473413. The next prime is 72473461. The reversal of 72473457 is 75437427.

It is not a de Polignac number, because 72473457 - 2¹¹ = 72471409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72473477) 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, 32457 + ... + 34617.

It is an arithmetic number, because the mean of its divisors is an integer number (6909752).

Almost surely, 2^72473457 is an apocalyptic number.

It is an amenable number.

72473457 is a deficient number, since it is larger than the sum of its proper divisors (38082575).

72473457 is a wasteful number, since it uses less digits than its factorization.

72473457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3768.

The product of its digits is 164640, while the sum is 39.

The square root of 72473457 is about 8513.1343816482. The cubic root of 72473457 is about 416.9266529611.

The spelling of 72473457 in words is "seventy-two million, four hundred seventy-three thousand, four hundred fifty-seven".