74736945 has 16 divisors (see below), whose sum is σ = 132865920. Its totient is φ = 39859632.

The previous prime is 74736931. The next prime is 74736953. The reversal of 74736945 is 54963747.

It is not a de Polignac number, because 74736945 - 2⁹ = 74736433 is a prime.

It is a super-2 number, since 2×74736945² = 11171221895866050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 74736945.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276669 + ... + 276938.

It is an arithmetic number, because the mean of its divisors is an integer number (8304120).

Almost surely, 2^74736945 is an apocalyptic number.

It is an amenable number.

74736945 is a deficient number, since it is larger than the sum of its proper divisors (58128975).

74736945 is a wasteful number, since it uses less digits than its factorization.

74736945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553621 (or 553615 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 74736945 is about 8645.0532097842. The cubic root of 74736945 is about 421.2227124708. Note that the first 3 decimals are identical.

The spelling of 74736945 in words is "seventy-four million, seven hundred thirty-six thousand, nine hundred forty-five".