13357978 has 8 divisors (see below), whose sum is σ = 20311668. Its totient is φ = 6587424.

The previous prime is 13357973. The next prime is 13357997. The reversal of 13357978 is 87975331.

It can be written as a sum of positive squares in 2 ways, for example, as 11607649 + 1750329 = 3407^2 + 1323^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (13357973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45601 + ... + 45892.

Almost surely, 2^13357978 is an apocalyptic number.

13357978 is a deficient number, since it is larger than the sum of its proper divisors (6953690).

13357978 is an equidigital number, since it uses as much as digits as its factorization.

13357978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91568.

The product of its digits is 158760, while the sum is 43.

The square root of 13357978 is about 3654.8567687394. The cubic root of 13357978 is about 237.2722277950.

The spelling of 13357978 in words is "thirteen million, three hundred fifty-seven thousand, nine hundred seventy-eight".