74121916 has 24 divisors (see below), whose sum is σ = 147659904. Its totient is φ = 32226480.

The previous prime is 74121911. The next prime is 74121917. The reversal of 74121916 is 61912147.

It is a super-2 number, since 2×74121916² = 10988116863022112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74121911) 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, 35610 + ... + 37633.

It is an arithmetic number, because the mean of its divisors is an integer number (6152496).

Almost surely, 2^74121916 is an apocalyptic number.

It is an amenable number.

74121916 is a deficient number, since it is larger than the sum of its proper divisors (73537988).

74121916 is a wasteful number, since it uses less digits than its factorization.

74121916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73281 (or 73279 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 74121916 is about 8609.4085743447. The cubic root of 74121916 is about 420.0640794141.

The spelling of 74121916 in words is "seventy-four million, one hundred twenty-one thousand, nine hundred sixteen".