74891424 has 24 divisors (see below), whose sum is σ = 196590240. Its totient is φ = 24963776.

The previous prime is 74891419. The next prime is 74891431. The reversal of 74891424 is 42419847.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389964 + ... + 390155.

It is an arithmetic number, because the mean of its divisors is an integer number (8191260).

Almost surely, 2^74891424 is an apocalyptic number.

It is an amenable number.

74891424 is an abundant number, since it is smaller than the sum of its proper divisors (121698816).

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

74891424 is a wasteful number, since it uses less digits than its factorization.

74891424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780132 (or 780124 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 74891424 is about 8653.9831291724. The cubic root of 74891424 is about 421.5127309357.

The spelling of 74891424 in words is "seventy-four million, eight hundred ninety-one thousand, four hundred twenty-four".