74990839 has 48 divisors (see below), whose sum is σ = 101122560. Its totient is φ = 54331200.

The previous prime is 74990831. The next prime is 74990857. The reversal of 74990839 is 93809947.

It is not a de Polignac number, because 74990839 - 2³ = 74990831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74990792 and 74990801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74990831) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1056174 + ... + 1056244.

It is an arithmetic number, because the mean of its divisors is an integer number (2106720).

Almost surely, 2^74990839 is an apocalyptic number.

74990839 is a deficient number, since it is larger than the sum of its proper divisors (26131721).

74990839 is a wasteful number, since it uses less digits than its factorization.

74990839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 74990839 is about 8659.7251111106. The cubic root of 74990839 is about 421.6991615370.

It can be divided in two parts, 749908 and 39, that added together give a palindrome (749947).

The spelling of 74990839 in words is "seventy-four million, nine hundred ninety thousand, eight hundred thirty-nine".