40433440 has 24 divisors (see below), whose sum is σ = 95524380. Its totient is φ = 16173312.

The previous prime is 40433401. The next prime is 40433443. The reversal of 40433440 is 4433404.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 39488656 + 944784 = 6284^2 + 972^2 .

It is not an unprimeable number, because it can be changed into a prime (40433443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126195 + ... + 126514.

Almost surely, 2^40433440 is an apocalyptic number.

40433440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40433440 is an abundant number, since it is smaller than the sum of its proper divisors (55090940).

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

40433440 is a wasteful number, since it uses less digits than its factorization.

40433440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252724 (or 252716 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 40433440 is about 6358.7294328348. The cubic root of 40433440 is about 343.2260407718.

Adding to 40433440 its reverse (4433404), we get a palindrome (44866844).

The spelling of 40433440 in words is "forty million, four hundred thirty-three thousand, four hundred forty".