72458709 has 24 divisors (see below), whose sum is σ = 104044608. Its totient is φ = 44697600.

The previous prime is 72458699. The next prime is 72458719. The reversal of 72458709 is 90785427.

It is an interprime number because it is at equal distance from previous prime (72458699) and next prime (72458719).

It is not a de Polignac number, because 72458709 - 2²³ = 64070101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72458719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 479784 + ... + 479934.

It is an arithmetic number, because the mean of its divisors is an integer number (4335192).

Almost surely, 2^72458709 is an apocalyptic number.

It is an amenable number.

72458709 is a deficient number, since it is larger than the sum of its proper divisors (31585899).

72458709 is a wasteful number, since it uses less digits than its factorization.

72458709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 72458709 is about 8512.2681466223. The cubic root of 72458709 is about 416.8983701862.

The spelling of 72458709 in words is "seventy-two million, four hundred fifty-eight thousand, seven hundred nine".