136831820 has 24 divisors (see below), whose sum is σ = 287791728. Its totient is φ = 54648000.

The previous prime is 136831811. The next prime is 136831829. The reversal of 136831820 is 28138631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (136831811) and next prime (136831829).

It is not an unprimeable number, because it can be changed into a prime (136831829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8870 + ... + 18770.

It is an arithmetic number, because the mean of its divisors is an integer number (11991322).

Almost surely, 2^136831820 is an apocalyptic number.

136831820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136831820 is an abundant number, since it is smaller than the sum of its proper divisors (150959908).

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

136831820 is a wasteful number, since it uses less digits than its factorization.

136831820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10601 (or 10599 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 136831820 is about 11697.5134109776. The cubic root of 136831820 is about 515.3026404798.

The spelling of 136831820 in words is "one hundred thirty-six million, eight hundred thirty-one thousand, eight hundred twenty".