135969744 has 80 divisors (see below), whose sum is σ = 371404800. Its totient is φ = 42776448.

The previous prime is 135969707. The next prime is 135969781. The reversal of 135969744 is 447969531.

It is an interprime number because it is at equal distance from previous prime (135969707) and next prime (135969781).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 135969693 and 135969702.

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, 86437 + ... + 87995.

It is an arithmetic number, because the mean of its divisors is an integer number (4642560).

Almost surely, 2^135969744 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 135969744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185702400).

135969744 is an abundant number, since it is smaller than the sum of its proper divisors (235435056).

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

135969744 is a wasteful number, since it uses less digits than its factorization.

135969744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672 (or 1666 counting only the distinct ones).

The product of its digits is 816480, while the sum is 48.

The square root of 135969744 is about 11660.6065022365. The cubic root of 135969744 is about 514.2181796681.

The spelling of 135969744 in words is "one hundred thirty-five million, nine hundred sixty-nine thousand, seven hundred forty-four".