133279992 has 80 divisors (see below), whose sum is σ = 377665200. Its totient is φ = 43908480.

The previous prime is 133279981. The next prime is 133280029. The reversal of 133279992 is 299972331.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56517 + ... + 58827.

It is an arithmetic number, because the mean of its divisors is an integer number (4720815).

Almost surely, 2^133279992 is an apocalyptic number.

133279992 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 133279992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188832600).

133279992 is an abundant number, since it is smaller than the sum of its proper divisors (244385208).

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

133279992 is a wasteful number, since it uses less digits than its factorization.

133279992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418 (or 2405 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 133279992 is about 11544.6954052500. The cubic root of 133279992 is about 510.8048192307.

The spelling of 133279992 in words is "one hundred thirty-three million, two hundred seventy-nine thousand, nine hundred ninety-two".