74791845 has 12 divisors (see below), whose sum is σ = 129639276. Its totient is φ = 39888960.

The previous prime is 74791811. The next prime is 74791853. The reversal of 74791845 is 54819747.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 54730404 + 20061441 = 7398^2 + 4479^2 .

It is not a de Polignac number, because 74791845 - 2⁶ = 74791781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1662041 = 74791845 / (7 + 4 + 7 + 9 + 1 + 8 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 74791845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 830976 + ... + 831065.

It is an arithmetic number, because the mean of its divisors is an integer number (10803273).

Almost surely, 2^74791845 is an apocalyptic number.

It is an amenable number.

74791845 is a deficient number, since it is larger than the sum of its proper divisors (54847431).

74791845 is a wasteful number, since it uses less digits than its factorization.

74791845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662052 (or 1662049 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 74791845 is about 8648.2278531500. The cubic root of 74791845 is about 421.3258273217.

The spelling of 74791845 in words is "seventy-four million, seven hundred ninety-one thousand, eight hundred forty-five".