75685440 has 56 divisors (see below), whose sum is σ = 240304320. Its totient is φ = 20182528.

The previous prime is 75685439. The next prime is 75685481. The reversal of 75685440 is 4458657.

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, 38460 + ... + 40379.

Almost surely, 2^75685440 is an apocalyptic number.

It is an amenable number.

75685440 is an abundant number, since it is smaller than the sum of its proper divisors (164618880).

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

75685440 is a wasteful number, since it uses less digits than its factorization.

75685440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78859 (or 78849 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 75685440 is about 8699.7379270872. The cubic root of 75685440 is about 422.9971552771.

The spelling of 75685440 in words is "seventy-five million, six hundred eighty-five thousand, four hundred forty".