72748745 has 4 divisors (see below), whose sum is σ = 87298500. Its totient is φ = 58198992.

The previous prime is 72748727. The next prime is 72748757. The reversal of 72748745 is 54784727.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13520329 + 59228416 = 3677^2 + 7696^2 .

It is a cyclic number.

It is not a de Polignac number, because 72748745 - 2⁶ = 72748681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72748696 and 72748705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7274870 + ... + 7274879.

It is an arithmetic number, because the mean of its divisors is an integer number (21824625).

Almost surely, 2^72748745 is an apocalyptic number.

It is an amenable number.

72748745 is a deficient number, since it is larger than the sum of its proper divisors (14549755).

72748745 is a wasteful number, since it uses less digits than its factorization.

72748745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14549754.

The product of its digits is 439040, while the sum is 44.

The square root of 72748745 is about 8529.2874848958. The cubic root of 72748745 is about 417.4538799497.

The spelling of 72748745 in words is "seventy-two million, seven hundred forty-eight thousand, seven hundred forty-five".