136311780 has 96 divisors (see below), whose sum is σ = 440899200. Its totient is φ = 31098880.

The previous prime is 136311751. The next prime is 136311781. The reversal of 136311780 is 87113631.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (136311781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5146 + ... + 17294.

It is an arithmetic number, because the mean of its divisors is an integer number (4592700).

Almost surely, 2^136311780 is an apocalyptic number.

136311780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136311780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220449600).

136311780 is an abundant number, since it is smaller than the sum of its proper divisors (304587420).

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

136311780 is a wasteful number, since it uses less digits than its factorization.

136311780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12189 (or 12187 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 136311780 is about 11675.2635944547. The cubic root of 136311780 is about 514.6489957496.

The spelling of 136311780 in words is "one hundred thirty-six million, three hundred eleven thousand, seven hundred eighty".