133444440 has 48 divisors (see below), whose sum is σ = 433695600. Its totient is φ = 35585088.

The previous prime is 133444433. The next prime is 133444453. The reversal of 133444440 is 44444331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184980 + ... + 185699.

It is an arithmetic number, because the mean of its divisors is an integer number (9035325).

Almost surely, 2^133444440 is an apocalyptic number.

133444440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133444440 is an abundant number, since it is smaller than the sum of its proper divisors (300251160).

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

133444440 is a wasteful number, since it uses less digits than its factorization.

133444440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370696 (or 370689 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 133444440 is about 11551.8154417390. The cubic root of 133444440 is about 511.0148190090.

Adding to 133444440 its reverse (44444331), we get a palindrome (177888771).

The spelling of 133444440 in words is "one hundred thirty-three million, four hundred forty-four thousand, four hundred forty".