74839869 has 56 divisors (see below), whose sum is σ = 123946200. Its totient is φ = 44883072.

The previous prime is 74839867. The next prime is 74839927. The reversal of 74839869 is 96893847.

It can be written as a sum of positive squares in 4 ways, for example, as 656100 + 74183769 = 810^2 + 8613^2 .

It is not a de Polignac number, because 74839869 - 2¹ = 74839867 is a prime.

It is a super-2 number, since 2×74839869² = 11202011983874322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74839867) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 502207 + ... + 502355.

It is an arithmetic number, because the mean of its divisors is an integer number (2213325).

Almost surely, 2^74839869 is an apocalyptic number.

It is an amenable number.

74839869 is a deficient number, since it is larger than the sum of its proper divisors (49106331).

74839869 is a wasteful number, since it uses less digits than its factorization.

74839869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 218 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 74839869 is about 8651.0039301806. The cubic root of 74839869 is about 421.4159860922.

The spelling of 74839869 in words is "seventy-four million, eight hundred thirty-nine thousand, eight hundred sixty-nine".