136631280 has 160 divisors (see below), whose sum is σ = 452471040. Its totient is φ = 34101504.

The previous prime is 136631273. The next prime is 136631309. The reversal of 136631280 is 82136631.

136631280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1646119 + ... + 1646201.

It is an arithmetic number, because the mean of its divisors is an integer number (2827944).

Almost surely, 2^136631280 is an apocalyptic number.

136631280 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 136631280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226235520).

136631280 is an abundant number, since it is smaller than the sum of its proper divisors (315839760).

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

136631280 is an equidigital number, since it uses as much as digits as its factorization.

136631280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 136631280 is about 11688.9383606896. The cubic root of 136631280 is about 515.0507757773.

The spelling of 136631280 in words is "one hundred thirty-six million, six hundred thirty-one thousand, two hundred eighty".