74509494 has 32 divisors (see below), whose sum is σ = 153375360. Its totient is φ = 24121152.

The previous prime is 74509493. The next prime is 74509511. The reversal of 74509494 is 49490547.

It is a super-2 number, since 2×74509494² = 11103329392272072, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74509493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28077 + ... + 30615.

It is an arithmetic number, because the mean of its divisors is an integer number (4792980).

Almost surely, 2^74509494 is an apocalyptic number.

74509494 is an abundant number, since it is smaller than the sum of its proper divisors (78865866).

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

74509494 is a wasteful number, since it uses less digits than its factorization.

74509494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 74509494 is about 8631.8882059489. Note that the first 3 decimals coincide. The cubic root of 74509494 is about 420.7949682722.

The spelling of 74509494 in words is "seventy-four million, five hundred nine thousand, four hundred ninety-four".