74129090 has 32 divisors (see below), whose sum is σ = 152807040. Its totient is φ = 25363584.

The previous prime is 74129087. The next prime is 74129131. The reversal of 74129090 is 9092147.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 51014 + ... + 52446.

It is an arithmetic number, because the mean of its divisors is an integer number (4775220).

Almost surely, 2^74129090 is an apocalyptic number.

74129090 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

74129090 is an abundant number, since it is smaller than the sum of its proper divisors (78677950).

74129090 is a wasteful number, since it uses less digits than its factorization.

74129090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 74129090 is about 8609.8252014777. The cubic root of 74129090 is about 420.0776311527.

The spelling of 74129090 in words is "seventy-four million, one hundred twenty-nine thousand, ninety".