136671380 has 24 divisors (see below), whose sum is σ = 287928648. Its totient is φ = 54493568.

The previous prime is 136671371. The next prime is 136671391. The reversal of 136671380 is 83176631.

It can be written as a sum of positive squares in 4 ways, for example, as 4605316 + 132066064 = 2146^2 + 11492^2 .

It is a super-2 number, since 2×136671380² = 37358132222208800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 136671380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4439 + ... + 17118.

It is an arithmetic number, because the mean of its divisors is an integer number (11997027).

Almost surely, 2^136671380 is an apocalyptic number.

136671380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136671380 is an abundant number, since it is smaller than the sum of its proper divisors (151257268).

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

136671380 is a wasteful number, since it uses less digits than its factorization.

136671380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21883 (or 21881 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 136671380 is about 11690.6535317749. The cubic root of 136671380 is about 515.1011583737.

The spelling of 136671380 in words is "one hundred thirty-six million, six hundred seventy-one thousand, three hundred eighty".