13400478 has 112 divisors (see below), whose sum is σ = 37459296. Its totient is φ = 3499200.

The previous prime is 13400459. The next prime is 13400479. The reversal of 13400478 is 87400431.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13400479) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 132628 + ... + 132728.

It is an arithmetic number, because the mean of its divisors is an integer number (334458).

Almost surely, 2^13400478 is an apocalyptic number.

13400478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13400478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18729648).

13400478 is an abundant number, since it is smaller than the sum of its proper divisors (24058818).

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

13400478 is a wasteful number, since it uses less digits than its factorization.

13400478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 13400478 is about 3660.6663327870. Note that the first 3 decimals coincide. The cubic root of 13400478 is about 237.5235980246.

The spelling of 13400478 in words is "thirteen million, four hundred thousand, four hundred seventy-eight".