133207992 has 96 divisors (see below), whose sum is σ = 382711680. Its totient is φ = 41783040.

The previous prime is 133207969. The next prime is 133208059. The reversal of 133207992 is 299702331.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81778 + ... + 83390.

It is an arithmetic number, because the mean of its divisors is an integer number (3986580).

Almost surely, 2^133207992 is an apocalyptic number.

133207992 is a gapful number since it is divisible by the number (12) 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 133207992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191355840).

133207992 is an abundant number, since it is smaller than the sum of its proper divisors (249503688).

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

133207992 is a wasteful number, since it uses less digits than its factorization.

133207992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693 (or 1686 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 133207992 is about 11541.5766687225. The cubic root of 133207992 is about 510.7128209967.

It can be divided in two parts, 13320 and 7992, that added together give a palindrome (21312).

The spelling of 133207992 in words is "one hundred thirty-three million, two hundred seven thousand, nine hundred ninety-two".