133420860 has 36 divisors (see below), whose sum is σ = 404710488. Its totient is φ = 35578848.

The previous prime is 133420843. The next prime is 133420871. The reversal of 133420860 is 68024331.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×133420860² = 35602251766279200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370434 + ... + 370793.

It is an arithmetic number, because the mean of its divisors is an integer number (11241958).

Almost surely, 2^133420860 is an apocalyptic number.

133420860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133420860 is an abundant number, since it is smaller than the sum of its proper divisors (271289628).

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

133420860 is a wasteful number, since it uses less digits than its factorization.

133420860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741242 (or 741237 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 133420860 is about 11550.7947778497. The cubic root of 133420860 is about 510.9847179941.

The spelling of 133420860 in words is "one hundred thirty-three million, four hundred twenty thousand, eight hundred sixty".