75499440 has 40 divisors (see below), whose sum is σ = 234049008. Its totient is φ = 20133120.

The previous prime is 75499433. The next prime is 75499469. The reversal of 75499440 is 4499457.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 75499392 and 75499401.

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, 157051 + ... + 157530.

Almost surely, 2^75499440 is an apocalyptic number.

It is an amenable number.

75499440 is an abundant number, since it is smaller than the sum of its proper divisors (158549568).

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

75499440 is a wasteful number, since it uses less digits than its factorization.

75499440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314597 (or 314591 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 75499440 is about 8689.0413740527. The cubic root of 75499440 is about 422.6503602175.

The spelling of 75499440 in words is "seventy-five million, four hundred ninety-nine thousand, four hundred forty".