13897494828 has 36 divisors (see below), whose sum is σ = 40148319120. Its totient is φ = 3970712736.

The previous prime is 13897494791. The next prime is 13897494889. The reversal of 13897494828 is 82849479831.

13897494828 is a `hidden beast` number, since 1 + 3 + 89 + 74 + 9 + 482 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 27574143 + ... + 27574646.

Almost surely, 2^13897494828 is an apocalyptic number.

13897494828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13897494828 is an abundant number, since it is smaller than the sum of its proper divisors (26250824292).

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

13897494828 is a wasteful number, since it uses less digits than its factorization.

13897494828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55148806 (or 55148801 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The spelling of 13897494828 in words is "thirteen billion, eight hundred ninety-seven million, four hundred ninety-four thousand, eight hundred twenty-eight".