74989090 has 16 divisors (see below), whose sum is σ = 147251520. Its totient is φ = 27268720.

The previous prime is 74989087. The next prime is 74989097. The reversal of 74989090 is 9098947.

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

It is a self number, because there is not a number n which added to its sum of digits gives 74989090.

It is not an unprimeable number, because it can be changed into a prime (74989097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340750 + ... + 340969.

It is an arithmetic number, because the mean of its divisors is an integer number (9203220).

Almost surely, 2^74989090 is an apocalyptic number.

74989090 is a deficient number, since it is larger than the sum of its proper divisors (72262430).

74989090 is a wasteful number, since it uses less digits than its factorization.

74989090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681737.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 74989090 is about 8659.6241257921. The cubic root of 74989090 is about 421.6958831029.

The spelling of 74989090 in words is "seventy-four million, nine hundred eighty-nine thousand, ninety".