74131624 has 16 divisors (see below), whose sum is σ = 158853600. Its totient is φ = 31770672.

The previous prime is 74131621. The next prime is 74131639. The reversal of 74131624 is 42613147.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 74131592 and 74131601.

It is not an unprimeable number, because it can be changed into a prime (74131621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661834 + ... + 661945.

It is an arithmetic number, because the mean of its divisors is an integer number (9928350).

Almost surely, 2^74131624 is an apocalyptic number.

It is an amenable number.

74131624 is an abundant number, since it is smaller than the sum of its proper divisors (84721976).

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

74131624 is a wasteful number, since it uses less digits than its factorization.

74131624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323792 (or 1323788 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 74131624 is about 8609.9723576792. The cubic root of 74131624 is about 420.0824176883.

The spelling of 74131624 in words is "seventy-four million, one hundred thirty-one thousand, six hundred twenty-four".