13031478 has 24 divisors (see below), whose sum is σ = 29463408. Its totient is φ = 4154832.

The previous prime is 13031467. The next prime is 13031479. The reversal of 13031478 is 87413031.

13031478 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031479) 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, 15325 + ... + 16152.

It is an arithmetic number, because the mean of its divisors is an integer number (1227642).

Almost surely, 2^13031478 is an apocalyptic number.

13031478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13031478 is an abundant number, since it is smaller than the sum of its proper divisors (16431930).

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

13031478 is a wasteful number, since it uses less digits than its factorization.

13031478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31508 (or 31505 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 13031478 is about 3609.9138493875. The cubic root of 13031478 is about 235.3230986533.

The spelling of 13031478 in words is "thirteen million, thirty-one thousand, four hundred seventy-eight".