856080778 has 8 divisors (see below), whose sum is σ = 1467567072. Its totient is φ = 366891756.

The previous prime is 856080773. The next prime is 856080809. The reversal of 856080778 is 877080658.

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

It is a super-2 number, since 2×856080778² = 1465748596922170568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (856080773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30574300 + ... + 30574327.

It is an arithmetic number, because the mean of its divisors is an integer number (183445884).

Almost surely, 2^856080778 is an apocalyptic number.

856080778 is a deficient number, since it is larger than the sum of its proper divisors (611486294).

856080778 is a wasteful number, since it uses less digits than its factorization.

856080778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61148636.

The product of its (nonzero) digits is 752640, while the sum is 49.

The square root of 856080778 is about 29258.8581116899. The cubic root of 856080778 is about 949.5217456091.

The spelling of 856080778 in words is "eight hundred fifty-six million, eighty thousand, seven hundred seventy-eight".