136874820 has 48 divisors (see below), whose sum is σ = 405796608. Its totient is φ = 34352640.

The previous prime is 136874813. The next prime is 136874821. The reversal of 136874820 is 28478631.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (136874821) 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, 66076 + ... + 68115.

It is an arithmetic number, because the mean of its divisors is an integer number (8454096).

Almost surely, 2^136874820 is an apocalyptic number.

136874820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136874820 is an abundant number, since it is smaller than the sum of its proper divisors (268921788).

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

136874820 is a wasteful number, since it uses less digits than its factorization.

136874820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134220 (or 134218 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 136874820 is about 11699.3512640659. The cubic root of 136874820 is about 515.3566135320.

The spelling of 136874820 in words is "one hundred thirty-six million, eight hundred seventy-four thousand, eight hundred twenty".