74691604 has 24 divisors (see below), whose sum is σ = 144573128. Its totient is φ = 33540480.

The previous prime is 74691587. The next prime is 74691607. The reversal of 74691604 is 40619647.

It can be written as a sum of positive squares in 4 ways, for example, as 16016004 + 58675600 = 4002^2 + 7660^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74691607) 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, 17487 + ... + 21334.

Almost surely, 2^74691604 is an apocalyptic number.

74691604 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

74691604 is a deficient number, since it is larger than the sum of its proper divisors (69881524).

74691604 is a wasteful number, since it uses less digits than its factorization.

74691604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38875 (or 38873 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 74691604 is about 8642.4304451931. The cubic root of 74691604 is about 421.1375135439.

The spelling of 74691604 in words is "seventy-four million, six hundred ninety-one thousand, six hundred four".