74739870 has 48 divisors (see below), whose sum is σ = 198469440. Its totient is φ = 19505472.

The previous prime is 74739869. The next prime is 74739877. The reversal of 74739870 is 7893747.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74739877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4605 + ... + 13064.

It is an arithmetic number, because the mean of its divisors is an integer number (4134780).

Almost surely, 2^74739870 is an apocalyptic number.

74739870 is an abundant number, since it is smaller than the sum of its proper divisors (123729570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74739870 is a wasteful number, since it uses less digits than its factorization.

74739870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17729 (or 17726 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 74739870 is about 8645.2223800201. Note that the first 3 decimals coincide. The cubic root of 74739870 is about 421.2282075681.

The spelling of 74739870 in words is "seventy-four million, seven hundred thirty-nine thousand, eight hundred seventy".