136400320 has 84 divisors (see below), whose sum is σ = 377875800. Its totient is φ = 46760448.

The previous prime is 136400309. The next prime is 136400339. The reversal of 136400320 is 23004631.

It is a super-2 number, since 2×136400320² = 37210094592204800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11331 + ... + 20029.

Almost surely, 2^136400320 is an apocalyptic number.

136400320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136400320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188937900).

136400320 is an abundant number, since it is smaller than the sum of its proper divisors (241475480).

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

136400320 is an equidigital number, since it uses as much as digits as its factorization.

136400320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8730 (or 8713 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 136400320 is about 11679.0547562720. The cubic root of 136400320 is about 514.7604000606.

Adding to 136400320 its reverse (23004631), we get a palindrome (159404951).

The spelling of 136400320 in words is "one hundred thirty-six million, four hundred thousand, three hundred twenty".