133864780 has 24 divisors (see below), whose sum is σ = 321275808. Its totient is φ = 45896448.

The previous prime is 133864777. The next prime is 133864781. The reversal of 133864780 is 87468331.

It is not an unprimeable number, because it can be changed into a prime (133864781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477949 + ... + 478228.

It is an arithmetic number, because the mean of its divisors is an integer number (13386492).

Almost surely, 2^133864780 is an apocalyptic number.

133864780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133864780 is an abundant number, since it is smaller than the sum of its proper divisors (187411028).

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

133864780 is a wasteful number, since it uses less digits than its factorization.

133864780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956193 (or 956191 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 133864780 is about 11569.9948141734. The cubic root of 133864780 is about 511.5508094388.

The spelling of 133864780 in words is "one hundred thirty-three million, eight hundred sixty-four thousand, seven hundred eighty".