75127440 has 40 divisors (see below), whose sum is σ = 232895808. Its totient is φ = 20033920.

The previous prime is 75127399. The next prime is 75127513. The reversal of 75127440 is 4472157.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 75127398 and 75127407.

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, 156276 + ... + 156755.

Almost surely, 2^75127440 is an apocalyptic number.

It is an amenable number.

75127440 is an abundant number, since it is smaller than the sum of its proper divisors (157768368).

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

75127440 is a wasteful number, since it uses less digits than its factorization.

75127440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313047 (or 313041 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 75127440 is about 8667.6086667546. The cubic root of 75127440 is about 421.9550576189.

Adding to 75127440 its reverse (4472157), we get a palindrome (79599597).

The spelling of 75127440 in words is "seventy-five million, one hundred twenty-seven thousand, four hundred forty".