74244557 has 4 divisors (see below), whose sum is σ = 74387040. Its totient is φ = 74102076.

The previous prime is 74244523. The next prime is 74244641. The reversal of 74244557 is 75544247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74244557 - 2⁶ = 74244493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74244557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74244517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70457 + ... + 71502.

It is an arithmetic number, because the mean of its divisors is an integer number (18596760).

Almost surely, 2^74244557 is an apocalyptic number.

It is an amenable number.

74244557 is a deficient number, since it is larger than the sum of its proper divisors (142483).

74244557 is a wasteful number, since it uses less digits than its factorization.

74244557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142482.

The product of its digits is 156800, while the sum is 38.

The square root of 74244557 is about 8616.5281291249. The cubic root of 74244557 is about 420.2956289769.

The spelling of 74244557 in words is "seventy-four million, two hundred forty-four thousand, five hundred fifty-seven".