75427280 has 30 divisors (see below), whose sum is σ = 175549218. Its totient is φ = 30139840.

The previous prime is 75427279. The next prime is 75427307. The reversal of 75427280 is 8272457.

It can be written as a sum of positive squares in only one way, i.e., 60341824 + 15085456 = 7768^2 + 3884^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 75427280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77195 + ... + 78165.

Almost surely, 2^75427280 is an apocalyptic number.

It is an amenable number.

75427280 is an abundant number, since it is smaller than the sum of its proper divisors (100121938).

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

75427280 is an frugal number, since it uses more digits than its factorization.

75427280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 75427280 is about 8684.8880246092. Note that the first 3 decimals coincide. The cubic root of 75427280 is about 422.5156653039.

The spelling of 75427280 in words is "seventy-five million, four hundred twenty-seven thousand, two hundred eighty".