1356731398 has 12 divisors (see below), whose sum is σ = 2220388668. Its totient is φ = 616617560.

The previous prime is 1356731371. The next prime is 1356731417. The reversal of 1356731398 is 8931376531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168840 + ... + 176692.

It is an arithmetic number, because the mean of its divisors is an integer number (185032389).

Almost surely, 2^1356731398 is an apocalyptic number.

1356731398 is a deficient number, since it is larger than the sum of its proper divisors (863657270).

1356731398 is an frugal number, since it uses more digits than its factorization.

1356731398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15719 (or 7866 counting only the distinct ones).

The product of its digits is 408240, while the sum is 46.

The square root of 1356731398 is about 36833.8349618934. The cubic root of 1356731398 is about 1107.0433443200.

The spelling of 1356731398 in words is "one billion, three hundred fifty-six million, seven hundred thirty-one thousand, three hundred ninety-eight".