1399399398 has 24 divisors (see below), whose sum is σ = 3045054168. Its totient is φ = 464463072.

The previous prime is 1399399367. The next prime is 1399399403. The reversal of 1399399398 is 8939939931.

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, 162640 + ... + 171027.

It is an arithmetic number, because the mean of its divisors is an integer number (126877257).

Almost surely, 2^1399399398 is an apocalyptic number.

1399399398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1399399398 is an abundant number, since it is smaller than the sum of its proper divisors (1645654770).

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

1399399398 is a wasteful number, since it uses less digits than its factorization.

1399399398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333908 (or 333905 counting only the distinct ones).

The product of its digits is 12754584, while the sum is 63.

The square root of 1399399398 is about 37408.5471249553. The cubic root of 1399399398 is about 1118.5289461483.

The spelling of 1399399398 in words is "one billion, three hundred ninety-nine million, three hundred ninety-nine thousand, three hundred ninety-eight".