75720856 has 64 divisors (see below), whose sum is σ = 158241600. Its totient is φ = 33804288.

The previous prime is 75720851. The next prime is 75720857. The reversal of 75720856 is 65802757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75720851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287781 + ... + 288043.

It is an arithmetic number, because the mean of its divisors is an integer number (2472525).

Almost surely, 2^75720856 is an apocalyptic number.

It is an amenable number.

75720856 is an abundant number, since it is smaller than the sum of its proper divisors (82520744).

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

75720856 is a wasteful number, since it uses less digits than its factorization.

75720856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 75720856 is about 8701.7731526396. The cubic root of 75720856 is about 423.0631236287.

The spelling of 75720856 in words is "seventy-five million, seven hundred twenty thousand, eight hundred fifty-six".