133940736 has 80 divisors (see below), whose sum is σ = 396514800. Its totient is φ = 44642304.

The previous prime is 133940693. The next prime is 133940783. The reversal of 133940736 is 637049331.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 133940736.

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, 8980 + ... + 18668.

It is an arithmetic number, because the mean of its divisors is an integer number (4956435).

Almost surely, 2^133940736 is an apocalyptic number.

133940736 is a gapful number since it is divisible by the number (16) 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 133940736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198257400).

133940736 is an abundant number, since it is smaller than the sum of its proper divisors (262574064).

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

133940736 is an frugal number, since it uses more digits than its factorization.

133940736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9716 (or 9694 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 36.

The square root of 133940736 is about 11573.2768047775. The cubic root of 133940736 is about 511.6475438864.

The spelling of 133940736 in words is "one hundred thirty-three million, nine hundred forty thousand, seven hundred thirty-six".