74172290 has 16 divisors (see below), whose sum is σ = 133997112. Its totient is φ = 29560704.

The previous prime is 74172277. The next prime is 74172299. The reversal of 74172290 is 9227147.

It can be written as a sum of positive squares in 4 ways, for example, as 33097009 + 41075281 = 5753^2 + 6409^2 .

It is not an unprimeable number, because it can be changed into a prime (74172299) 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 7 ways as a sum of consecutive naturals, for example, 10619 + ... + 16158.

Almost surely, 2^74172290 is an apocalyptic number.

74172290 is a deficient number, since it is larger than the sum of its proper divisors (59824822).

74172290 is a wasteful number, since it uses less digits than its factorization.

74172290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27061.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 74172290 is about 8612.3335978119. Note that the first 3 decimals coincide. The cubic root of 74172290 is about 420.1592177902.

The spelling of 74172290 in words is "seventy-four million, one hundred seventy-two thousand, two hundred ninety".