40103440 has 40 divisors (see below), whose sum is σ = 100415448. Its totient is φ = 14807040.

The previous prime is 40103431. The next prime is 40103447. The reversal of 40103440 is 4430104.

It can be written as a sum of positive squares in 4 ways, for example, as 9216 + 40094224 = 96^2 + 6332^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (40103447) 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, 18241 + ... + 20320.

Almost surely, 2^40103440 is an apocalyptic number.

40103440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40103440 is an abundant number, since it is smaller than the sum of its proper divisors (60312008).

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

40103440 is a wasteful number, since it uses less digits than its factorization.

40103440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38587 (or 38581 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40103440 is about 6332.7276903401. The cubic root of 40103440 is about 342.2897354355.

Adding to 40103440 its reverse (4430104), we get a palindrome (44533544).

The spelling of 40103440 in words is "forty million, one hundred three thousand, four hundred forty".