133877840 has 80 divisors (see below), whose sum is σ = 330216960. Its totient is φ = 50388480.

The previous prime is 133877801. The next prime is 133877867. The reversal of 133877840 is 48778331.

It is a tau number, because it is divible by the number of its divisors (80).

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, 91031 + ... + 92489.

It is an arithmetic number, because the mean of its divisors is an integer number (4127712).

Almost surely, 2^133877840 is an apocalyptic number.

133877840 is a gapful number since it is divisible by the number (10) 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 133877840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165108480).

133877840 is an abundant number, since it is smaller than the sum of its proper divisors (196339120).

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

133877840 is a wasteful number, since it uses less digits than its factorization.

133877840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 1534 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 133877840 is about 11570.5591913269. The cubic root of 133877840 is about 511.5674447239.

The spelling of 133877840 in words is "one hundred thirty-three million, eight hundred seventy-seven thousand, eight hundred forty".