136572640 has 96 divisors (see below), whose sum is σ = 335301120. Its totient is φ = 52531200.

The previous prime is 136572619. The next prime is 136572673. The reversal of 136572640 is 46275631.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 136572596 and 136572605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 714945 + ... + 715135.

It is an arithmetic number, because the mean of its divisors is an integer number (3492720).

Almost surely, 2^136572640 is an apocalyptic number.

136572640 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 136572640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167650560).

136572640 is an abundant number, since it is smaller than the sum of its proper divisors (198728480).

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

136572640 is a wasteful number, since it uses less digits than its factorization.

136572640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 136572640 is about 11686.4297370925. The cubic root of 136572640 is about 514.9770813315.

The spelling of 136572640 in words is "one hundred thirty-six million, five hundred seventy-two thousand, six hundred forty".