136720444 has 24 divisors (see below), whose sum is σ = 275955680. Its totient is φ = 58055616.

The previous prime is 136720411. The next prime is 136720469. The reversal of 136720444 is 444027631.

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, 19347 + ... + 25450.

Almost surely, 2^136720444 is an apocalyptic number.

136720444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

136720444 is an abundant number, since it is smaller than the sum of its proper divisors (139235236).

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

136720444 is a wasteful number, since it uses less digits than its factorization.

136720444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44917 (or 44915 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 136720444 is about 11692.7517719312. The cubic root of 136720444 is about 515.1627901495.

The spelling of 136720444 in words is "one hundred thirty-six million, seven hundred twenty thousand, four hundred forty-four".