74909530 has 16 divisors (see below), whose sum is σ = 135111240. Its totient is φ = 29902912.

The previous prime is 74909509. The next prime is 74909537. The reversal of 74909530 is 3590947.

It can be written as a sum of positive squares in 4 ways, for example, as 63027721 + 11881809 = 7939^2 + 3447^2 .

It is a super-2 number, since 2×74909530² = 11222875369641800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74909530.

It is not an unprimeable number, because it can be changed into a prime (74909537) 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, 2269 + ... + 12448.

Almost surely, 2^74909530 is an apocalyptic number.

74909530 is a deficient number, since it is larger than the sum of its proper divisors (60201710).

74909530 is a wasteful number, since it uses less digits than its factorization.

74909530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15233.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 74909530 is about 8655.0291738388. The cubic root of 74909530 is about 421.5466969723.

It can be divided in two parts, 7490 and 9530, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 74909530 in words is "seventy-four million, nine hundred nine thousand, five hundred thirty".