1319898978 has 48 divisors (see below), whose sum is σ = 2966745600. Its totient is φ = 423783360.

The previous prime is 1319898977. The next prime is 1319899001. The reversal of 1319898978 is 8798989131.

It is not an unprimeable number, because it can be changed into a prime (1319898977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46983 + ... + 69621.

It is an arithmetic number, because the mean of its divisors is an integer number (61807200).

Almost surely, 2^1319898978 is an apocalyptic number.

1319898978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1319898978 is an abundant number, since it is smaller than the sum of its proper divisors (1646846622).

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

1319898978 is a wasteful number, since it uses less digits than its factorization.

1319898978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22767 (or 22764 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 63.

The square root of 1319898978 is about 36330.4139530504. The cubic root of 1319898978 is about 1096.9333256247.

The spelling of 1319898978 in words is "one billion, three hundred nineteen million, eight hundred ninety-eight thousand, nine hundred seventy-eight".