136478464 has 72 divisors (see below), whose sum is σ = 282848720. Its totient is φ = 65691648.

The previous prime is 136478449. The next prime is 136478471. The reversal of 136478464 is 464874631.

It is a super-4 number, since 4×136478464⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 136478464.

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, 1252042 + ... + 1252150.

Almost surely, 2^136478464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136478464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141424360).

136478464 is an abundant number, since it is smaller than the sum of its proper divisors (146370256).

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

136478464 is an equidigital number, since it uses as much as digits as its factorization.

136478464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 251 counting only the distinct ones).

The product of its digits is 387072, while the sum is 43.

The square root of 136478464 is about 11682.3997534753. The cubic root of 136478464 is about 514.8586836946.

The spelling of 136478464 in words is "one hundred thirty-six million, four hundred seventy-eight thousand, four hundred sixty-four".