1119999978 has 12 divisors (see below), whose sum is σ = 2426666658. Its totient is φ = 373333320.

The previous prime is 1119999977. The next prime is 1119999983. The reversal of 1119999978 is 8799999111.

1119999978 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1108690209 + 11309769 = 33297^2 + 3363^2 .

It is not an unprimeable number, because it can be changed into a prime (1119999971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31111093 + ... + 31111128.

Almost surely, 2^1119999978 is an apocalyptic number.

1119999978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1119999978 is an abundant number, since it is smaller than the sum of its proper divisors (1306666680).

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

1119999978 is a wasteful number, since it uses less digits than its factorization.

1119999978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62222229 (or 62222226 counting only the distinct ones).

The product of its digits is 3306744, while the sum is 63.

The square root of 1119999978 is about 33466.4007326752. The cubic root of 1119999978 is about 1038.4988135705.

The spelling of 1119999978 in words is "one billion, one hundred nineteen million, nine hundred ninety-nine thousand, nine hundred seventy-eight".