136820372 has 24 divisors (see below), whose sum is σ = 259396200. Its totient is φ = 63143808.

The previous prime is 136820371. The next prime is 136820381. The reversal of 136820372 is 273028631.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 50069776 + 86750596 = 7076^2 + 9314^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136820371) 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, 1004 + ... + 16572.

It is an arithmetic number, because the mean of its divisors is an integer number (10808175).

Almost surely, 2^136820372 is an apocalyptic number.

It is an amenable number.

136820372 is a deficient number, since it is larger than the sum of its proper divisors (122575828).

136820372 is a wasteful number, since it uses less digits than its factorization.

136820372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15612 (or 15584 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 136820372 is about 11697.0240659751. The cubic root of 136820372 is about 515.2882691902.

The spelling of 136820372 in words is "one hundred thirty-six million, eight hundred twenty thousand, three hundred seventy-two".