74089428 has 24 divisors (see below), whose sum is σ = 197572032. Its totient is φ = 21168384.

The previous prime is 74089397. The next prime is 74089453. The reversal of 74089428 is 82498047.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 74089428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440925 + ... + 441092.

It is an arithmetic number, because the mean of its divisors is an integer number (8232168).

Almost surely, 2^74089428 is an apocalyptic number.

It is an amenable number.

74089428 is an abundant number, since it is smaller than the sum of its proper divisors (123482604).

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

74089428 is a wasteful number, since it uses less digits than its factorization.

74089428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882031 (or 882029 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 74089428 is about 8607.5215945126. The cubic root of 74089428 is about 420.0026983954.

It can be divided in two parts, 7408 and 9428, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 74089428 in words is "seventy-four million, eighty-nine thousand, four hundred twenty-eight".