40403244 has 36 divisors (see below), whose sum is σ = 109667544. Its totient is φ = 11543616.

The previous prime is 40403243. The next prime is 40403257. The reversal of 40403244 is 44230404.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 40403244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40403243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33769 + ... + 34944.

Almost surely, 2^40403244 is an apocalyptic number.

It is an amenable number.

40403244 is an abundant number, since it is smaller than the sum of its proper divisors (69264300).

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

40403244 is a wasteful number, since it uses less digits than its factorization.

40403244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68734 (or 68725 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 40403244 is about 6356.3546156583. The cubic root of 40403244 is about 343.1405782225.

Adding to 40403244 its reverse (44230404), we get a palindrome (84633648).

The spelling of 40403244 in words is "forty million, four hundred three thousand, two hundred forty-four".