133456780 has 24 divisors (see below), whose sum is σ = 287835408. Its totient is φ = 51939648.

The previous prime is 133456747. The next prime is 133456781. The reversal of 133456780 is 87654331.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (133456781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89434 + ... + 90913.

It is an arithmetic number, because the mean of its divisors is an integer number (11993142).

Almost surely, 2^133456780 is an apocalyptic number.

133456780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133456780 is an abundant number, since it is smaller than the sum of its proper divisors (154378628).

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

133456780 is a wasteful number, since it uses less digits than its factorization.

133456780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180393 (or 180391 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 133456780 is about 11552.3495445732. The cubic root of 133456780 is about 511.0305702048.

The spelling of 133456780 in words is "one hundred thirty-three million, four hundred fifty-six thousand, seven hundred eighty".