133940856 has 64 divisors (see below), whose sum is σ = 389203200. Its totient is φ = 37617408.

The previous prime is 133940837. The next prime is 133940887. The reversal of 133940856 is 658049331.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3156 + ... + 16668.

It is an arithmetic number, because the mean of its divisors is an integer number (6081300).

Almost surely, 2^133940856 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 133940856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194601600).

133940856 is an abundant number, since it is smaller than the sum of its proper divisors (255262344).

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

133940856 is a wasteful number, since it uses less digits than its factorization.

133940856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13588 (or 13584 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 133940856 is about 11573.2819891334. The cubic root of 133940856 is about 511.6476966846.

It can be divided in two parts, 1339 and 40856, that added together give a triangular number (42195 = T₂₉₀).

The spelling of 133940856 in words is "one hundred thirty-three million, nine hundred forty thousand, eight hundred fifty-six".