136478940 has 96 divisors (see below), whose sum is σ = 422748480. Its totient is φ = 32679936.

The previous prime is 136478939. The next prime is 136478963. The reversal of 136478940 is 49874631.

It is a junction number, because it is equal to n+sod(n) for n = 136478892 and 136478901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26496 + ... + 31224.

It is an arithmetic number, because the mean of its divisors is an integer number (4403630).

Almost surely, 2^136478940 is an apocalyptic number.

136478940 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 136478940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211374240).

136478940 is an abundant number, since it is smaller than the sum of its proper divisors (286269540).

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

136478940 is a wasteful number, since it uses less digits than its factorization.

136478940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4791 (or 4789 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 136478940 is about 11682.4201259842. The cubic root of 136478940 is about 514.8592822566.

The spelling of 136478940 in words is "one hundred thirty-six million, four hundred seventy-eight thousand, nine hundred forty".