136869444 has 36 divisors (see below), whose sum is σ = 357908460. Its totient is φ = 44049600.

The previous prime is 136869437. The next prime is 136869449. The reversal of 136869444 is 444968631.

It can be written as a sum of positive squares in 2 ways, for example, as 65804544 + 71064900 = 8112^2 + 8430^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 136869444.

It is not an unprimeable number, because it can be changed into a prime (136869449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64507 + ... + 66594.

Almost surely, 2^136869444 is an apocalyptic number.

It is an amenable number.

136869444 is an abundant number, since it is smaller than the sum of its proper divisors (221039016).

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

136869444 is a wasteful number, since it uses less digits than its factorization.

136869444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131140 (or 131135 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 136869444 is about 11699.1215054807. The cubic root of 136869444 is about 515.3498662636.

The spelling of 136869444 in words is "one hundred thirty-six million, eight hundred sixty-nine thousand, four hundred forty-four".