13504378 has 4 divisors (see below), whose sum is σ = 20256570. Its totient is φ = 6752188.

The previous prime is 13504331. The next prime is 13504399. The reversal of 13504378 is 87340531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87340531 = 1831 ⋅47701.

It can be written as a sum of positive squares in only one way, i.e., 12510369 + 994009 = 3537^2 + 997^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3376093 + ... + 3376096.

Almost surely, 2^13504378 is an apocalyptic number.

13504378 is a deficient number, since it is larger than the sum of its proper divisors (6752192).

13504378 is an equidigital number, since it uses as much as digits as its factorization.

13504378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6752191.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 13504378 is about 3674.8303362196. The cubic root of 13504378 is about 238.1358944274.

The spelling of 13504378 in words is "thirteen million, five hundred four thousand, three hundred seventy-eight".