74289440 has 24 divisors (see below), whose sum is σ = 175509180. Its totient is φ = 29715712.

The previous prime is 74289431. The next prime is 74289443. The reversal of 74289440 is 4498247.

It can be written as a sum of positive squares in 2 ways, for example, as 65739664 + 8549776 = 8108^2 + 2924^2 .

It is a junction number, because it is equal to n+sod(n) for n = 74289394 and 74289403.

It is not an unprimeable number, because it can be changed into a prime (74289443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231995 + ... + 232314.

Almost surely, 2^74289440 is an apocalyptic number.

It is an amenable number.

74289440 is an abundant number, since it is smaller than the sum of its proper divisors (101219740).

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

74289440 is a wasteful number, since it uses less digits than its factorization.

74289440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464324 (or 464316 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 74289440 is about 8619.1322068988. The cubic root of 74289440 is about 420.3803055712.

The spelling of 74289440 in words is "seventy-four million, two hundred eighty-nine thousand, four hundred forty".