74423657 has 16 divisors (see below), whose sum is σ = 95990400. Its totient is φ = 55991040.

The previous prime is 74423647. The next prime is 74423683. The reversal of 74423657 is 75632447.

It is not a de Polignac number, because 74423657 - 2⁶ = 74423593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74423657.

It is not an unprimeable number, because it can be changed into a prime (74423617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14432 + ... + 18897.

It is an arithmetic number, because the mean of its divisors is an integer number (5999400).

Almost surely, 2^74423657 is an apocalyptic number.

74423657 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

74423657 is a deficient number, since it is larger than the sum of its proper divisors (21566743).

74423657 is a wasteful number, since it uses less digits than its factorization.

74423657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33376.

The product of its digits is 141120, while the sum is 38.

The square root of 74423657 is about 8626.9146860277. The cubic root of 74423657 is about 420.6333170295.

The spelling of 74423657 in words is "seventy-four million, four hundred twenty-three thousand, six hundred fifty-seven".