40463440 has 40 divisors (see below), whose sum is σ = 98172288. Its totient is φ = 15480960.

The previous prime is 40463429. The next prime is 40463443. The reversal of 40463440 is 4436404.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40463443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9156 + ... + 12835.

Almost surely, 2^40463440 is an apocalyptic number.

40463440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40463440 is an abundant number, since it is smaller than the sum of its proper divisors (57708848).

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

40463440 is a wasteful number, since it uses less digits than its factorization.

40463440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22027 (or 22021 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 40463440 is about 6361.0879572601. The cubic root of 40463440 is about 343.3109064644.

Adding to 40463440 its reverse (4436404), we get a palindrome (44899844).

The spelling of 40463440 in words is "forty million, four hundred sixty-three thousand, four hundred forty".