136780 has 24 divisors (see below), whose sum is σ = 328608. Its totient is φ = 46848.

The previous prime is 136777. The next prime is 136811. The reversal of 136780 is 87631.

136780 = T₄₀ + T₄₁ + ... + T₉₅.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349 + ... + 628.

It is an arithmetic number, because the mean of its divisors is an integer number (13692).

2¹³⁶⁷⁸⁰ is an apocalyptic number.

136780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136780 is an abundant number, since it is smaller than the sum of its proper divisors (191828).

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

136780 is a wasteful number, since it uses less digits than its factorization.

136780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 991 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 136780 is about 369.8378022864. The cubic root of 136780 is about 51.5237581650.

The spelling of 136780 in words is "one hundred thirty-six thousand, seven hundred eighty".