1319905998 has 24 divisors (see below), whose sum is σ = 2861703000. Its totient is φ = 439675344.

The previous prime is 1319905981. The next prime is 1319906023. The reversal of 1319905998 is 8995099131.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4213 + ... + 51551.

It is an arithmetic number, because the mean of its divisors is an integer number (119237625).

Almost surely, 2^1319905998 is an apocalyptic number.

1319905998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1319905998 is an abundant number, since it is smaller than the sum of its proper divisors (1541797002).

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

1319905998 is a wasteful number, since it uses less digits than its factorization.

1319905998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48896 (or 48893 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 54.

The square root of 1319905998 is about 36330.5105661894. The cubic root of 1319905998 is about 1096.9352703338.

The spelling of 1319905998 in words is "one billion, three hundred nineteen million, nine hundred five thousand, nine hundred ninety-eight".