13157478 has 24 divisors (see below), whose sum is σ = 29564808. Its totient is φ = 4385664.

The previous prime is 13157471. The next prime is 13157479. The reversal of 13157478 is 87475131.

13157478 is a `hidden beast` number, since 13 + 1 + 574 + 78 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13157471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13051 + ... + 14022.

It is an arithmetic number, because the mean of its divisors is an integer number (1231867).

Almost surely, 2^13157478 is an apocalyptic number.

13157478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13157478 is an abundant number, since it is smaller than the sum of its proper divisors (16407330).

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

13157478 is an equidigital number, since it uses as much as digits as its factorization.

13157478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27090 (or 27078 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 13157478 is about 3627.3238068857. The cubic root of 13157478 is about 236.0791054359.

The spelling of 13157478 in words is "thirteen million, one hundred fifty-seven thousand, four hundred seventy-eight".