74772257 has 8 divisors (see below), whose sum is σ = 85729536. Its totient is φ = 63883872.

The previous prime is 74772251. The next prime is 74772289. The reversal of 74772257 is 75227747.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74772257 - 2¹⁰ = 74771233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74772251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14873 + ... + 19254.

It is an arithmetic number, because the mean of its divisors is an integer number (10716192).

Almost surely, 2^74772257 is an apocalyptic number.

It is an amenable number.

74772257 is a deficient number, since it is larger than the sum of its proper divisors (10957279).

74772257 is a wasteful number, since it uses less digits than its factorization.

74772257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34447.

The product of its digits is 192080, while the sum is 41.

The square root of 74772257 is about 8647.0952926402. The cubic root of 74772257 is about 421.2890423358.

The spelling of 74772257 in words is "seventy-four million, seven hundred seventy-two thousand, two hundred fifty-seven".