13028978747394 has 40 divisors (see below), whose sum is σ = 29204833450320. Its totient is φ = 4341465153144.

The previous prime is 13028978747387. The next prime is 13028978747441. The reversal of 13028978747394 is 49374787982031.

13028978747394 is a `hidden beast` number, since 1 + 3 + 0 + 2 + 89 + 78 + 7 + 473 + 9 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13683964 + ... + 14605095.

It is an arithmetic number, because the mean of its divisors is an integer number (730120836258).

Almost surely, 2^{13028978747394} is an apocalyptic number.

13028978747394 is an abundant number, since it is smaller than the sum of its proper divisors (16175854702926).

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

13028978747394 is a wasteful number, since it uses less digits than its factorization.

13028978747394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28291916 (or 28291907 counting only the distinct ones).

The product of its (nonzero) digits is 512096256, while the sum is 72.

The spelling of 13028978747394 in words is "thirteen trillion, twenty-eight billion, nine hundred seventy-eight million, seven hundred forty-seven thousand, three hundred ninety-four".