994971778 has 16 divisors (see below), whose sum is σ = 1499400000. Its totient is φ = 495177552.

The previous prime is 994971763. The next prime is 994971799. The reversal of 994971778 is 877179499.

It is a super-3 number, since 3×994971778³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 584773 + ... + 586471.

It is an arithmetic number, because the mean of its divisors is an integer number (93712500).

Almost surely, 2^994971778 is an apocalyptic number.

994971778 is a deficient number, since it is larger than the sum of its proper divisors (504428222).

994971778 is a wasteful number, since it uses less digits than its factorization.

994971778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889.

The product of its digits is 8001504, while the sum is 61.

The square root of 994971778 is about 31543.1732392288. The cubic root of 994971778 is about 998.3211089021.

The spelling of 994971778 in words is "nine hundred ninety-four million, nine hundred seventy-one thousand, seven hundred seventy-eight".