136678720 has 56 divisors (see below), whose sum is σ = 326550528. Its totient is φ = 54489600.

The previous prime is 136678669. The next prime is 136678739. The reversal of 136678720 is 27876631.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 137425 + ... + 138415.

Almost surely, 2^136678720 is an apocalyptic number.

136678720 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 136678720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163275264).

136678720 is an abundant number, since it is smaller than the sum of its proper divisors (189871808).

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

136678720 is an equidigital number, since it uses as much as digits as its factorization.

136678720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439 (or 1429 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 136678720 is about 11690.9674535515. The cubic root of 136678720 is about 515.1103794576.

The spelling of 136678720 in words is "one hundred thirty-six million, six hundred seventy-eight thousand, seven hundred twenty".