76840557 has 8 divisors (see below), whose sum is σ = 102506976. Its totient is φ = 51200592.

The previous prime is 76840549. The next prime is 76840567. The reversal of 76840557 is 75504867.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 76840557 - 2³ = 76840549 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76840567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1638 + ... + 12504.

It is an arithmetic number, because the mean of its divisors is an integer number (12813372).

Almost surely, 2^76840557 is an apocalyptic number.

It is an amenable number.

76840557 is a deficient number, since it is larger than the sum of its proper divisors (25666419).

76840557 is a wasteful number, since it uses less digits than its factorization.

76840557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13227.

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 76840557 is about 8765.8745713135. The cubic root of 76840557 is about 425.1382378454.

The spelling of 76840557 in words is "seventy-six million, eight hundred forty thousand, five hundred fifty-seven".