136890810 has 120 divisors (see below), whose sum is σ = 428303700. Its totient is φ = 31280256.

The previous prime is 136890791. The next prime is 136890857. The reversal of 136890810 is 18098631.

It can be written as a sum of positive squares in 2 ways, for example, as 113358609 + 23532201 = 10647^2 + 4851^2 .

It is a super-2 number, since 2×136890810² = 37478187724912200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 37966 + ... + 41414.

Almost surely, 2^136890810 is an apocalyptic number.

136890810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 136890810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214151850).

136890810 is an abundant number, since it is smaller than the sum of its proper divisors (291412890).

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

136890810 is a wasteful number, since it uses less digits than its factorization.

136890810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482 (or 3466 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 136890810 is about 11700.0346153334. The cubic root of 136890810 is about 515.3766810929.

It can be divided in two parts, 136890 and 810, that multiplied together give a square (110880900 = 10530²).

The spelling of 136890810 in words is "one hundred thirty-six million, eight hundred ninety thousand, eight hundred ten".