1077998857 has 8 divisors (see below), whose sum is σ = 1162546560. Its totient is φ = 993683280.

The previous prime is 1077998851. The next prime is 1077998897. The reversal of 1077998857 is 7588997701.

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

It is a cyclic number.

It is not a de Polignac number, because 1077998857 - 2²³ = 1069610249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1077998795 and 1077998804.

It is not an unprimeable number, because it can be changed into a prime (1077998851) 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, 48319 + ... + 67012.

It is an arithmetic number, because the mean of its divisors is an integer number (145318320).

Almost surely, 2^1077998857 is an apocalyptic number.

It is an amenable number.

1077998857 is a deficient number, since it is larger than the sum of its proper divisors (84547703).

1077998857 is a wasteful number, since it uses less digits than its factorization.

1077998857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116063.

The product of its (nonzero) digits is 8890560, while the sum is 61.

The square root of 1077998857 is about 32832.8929124438. The cubic root of 1077998857 is about 1025.3514898450.

The spelling of 1077998857 in words is "one billion, seventy-seven million, nine hundred ninety-eight thousand, eight hundred fifty-seven".