133910440 has 32 divisors (see below), whose sum is σ = 304413480. Its totient is φ = 53010432.

The previous prime is 133910419. The next prime is 133910449. The reversal of 133910440 is 44019331.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 124411716 + 9498724 = 11154^2 + 3082^2 .

It is not an unprimeable number, because it can be changed into a prime (133910449) 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, 13377 + ... + 21136.

Almost surely, 2^133910440 is an apocalyptic number.

133910440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133910440 is an abundant number, since it is smaller than the sum of its proper divisors (170503040).

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

133910440 is a wasteful number, since it uses less digits than its factorization.

133910440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34621 (or 34617 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 133910440 is about 11571.9678533947. The cubic root of 133910440 is about 511.6089645284.

Adding to 133910440 its reverse (44019331), we get a palindrome (177929771).

The spelling of 133910440 in words is "one hundred thirty-three million, nine hundred ten thousand, four hundred forty".