136378280 has 32 divisors (see below), whose sum is σ = 309898440. Its totient is φ = 54009600.

The previous prime is 136378279. The next prime is 136378309. The reversal of 136378280 is 82873631.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 134884996 + 1493284 = 11614^2 + 1222^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12839 + ... + 20918.

Almost surely, 2^136378280 is an apocalyptic number.

136378280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136378280 is an abundant number, since it is smaller than the sum of its proper divisors (173520160).

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

136378280 is a wasteful number, since it uses less digits than its factorization.

136378280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33869 (or 33865 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 136378280 is about 11678.1111486404. Note that the first 4 decimals coincide. The cubic root of 136378280 is about 514.7326730231.

The spelling of 136378280 in words is "one hundred thirty-six million, three hundred seventy-eight thousand, two hundred eighty".