133879820 has 12 divisors (see below), whose sum is σ = 281147664. Its totient is φ = 53551920.

The previous prime is 133879789. The next prime is 133879841. The reversal of 133879820 is 28978331.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3346976 + ... + 3347015.

It is an arithmetic number, because the mean of its divisors is an integer number (23428972).

Almost surely, 2^133879820 is an apocalyptic number.

133879820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133879820 is an abundant number, since it is smaller than the sum of its proper divisors (147267844).

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

133879820 is a wasteful number, since it uses less digits than its factorization.

133879820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6694000 (or 6693998 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 133879820 is about 11570.6447529945. The cubic root of 133879820 is about 511.5699666711.

The spelling of 133879820 in words is "one hundred thirty-three million, eight hundred seventy-nine thousand, eight hundred twenty".