13342778 has 4 divisors (see below), whose sum is σ = 20014170. Its totient is φ = 6671388.

The previous prime is 13342757. The next prime is 13342781. The reversal of 13342778 is 87724331.

13342778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11202409 + 2140369 = 3347^2 + 1463^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3335693 + ... + 3335696.

Almost surely, 2^13342778 is an apocalyptic number.

13342778 is a deficient number, since it is larger than the sum of its proper divisors (6671392).

13342778 is an equidigital number, since it uses as much as digits as its factorization.

13342778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6671391.

The product of its digits is 28224, while the sum is 35.

The square root of 13342778 is about 3652.7767520066. The cubic root of 13342778 is about 237.1821965372.

The spelling of 13342778 in words is "thirteen million, three hundred forty-two thousand, seven hundred seventy-eight".