136831240 has 64 divisors (see below), whose sum is σ = 378927360. Its totient is φ = 43303680.

The previous prime is 136831237. The next prime is 136831243. The reversal of 136831240 is 42138631.

It is an interprime number because it is at equal distance from previous prime (136831237) and next prime (136831243).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 136831199 and 136831208.

It is not an unprimeable number, because it can be changed into a prime (136831243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15156 + ... + 22435.

It is an arithmetic number, because the mean of its divisors is an integer number (5920740).

Almost surely, 2^136831240 is an apocalyptic number.

136831240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136831240 is an abundant number, since it is smaller than the sum of its proper divisors (242096120).

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

136831240 is a wasteful number, since it uses less digits than its factorization.

136831240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37622 (or 37618 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 136831240 is about 11697.4886193576. The cubic root of 136831240 is about 515.3019123939.

Adding to 136831240 its reverse (42138631), we get a palindrome (178969871).

The spelling of 136831240 in words is "one hundred thirty-six million, eight hundred thirty-one thousand, two hundred forty".