133989456 has 40 divisors (see below), whose sum is σ = 350890240. Its totient is φ = 44050176.

The previous prime is 133989439. The next prime is 133989487. The reversal of 133989456 is 654989331.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15616 + ... + 22623.

It is an arithmetic number, because the mean of its divisors is an integer number (8772256).

Almost surely, 2^133989456 is an apocalyptic number.

133989456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133989456 is an abundant number, since it is smaller than the sum of its proper divisors (216900784).

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

133989456 is a wasteful number, since it uses less digits than its factorization.

133989456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38323 (or 38317 counting only the distinct ones).

The product of its digits is 699840, while the sum is 48.

The square root of 133989456 is about 11575.3814623968. The cubic root of 133989456 is about 511.7095724306.

The spelling of 133989456 in words is "one hundred thirty-three million, nine hundred eighty-nine thousand, four hundred fifty-six".