40302444 has 144 divisors (see below), whose sum is σ = 123959808. Its totient is φ = 9944064.

The previous prime is 40302421. The next prime is 40302473. The reversal of 40302444 is 44420304.

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 40302444.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 241249 + ... + 241415.

It is an arithmetic number, because the mean of its divisors is an integer number (860832).

Almost surely, 2^40302444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40302444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61979904).

40302444 is an abundant number, since it is smaller than the sum of its proper divisors (83657364).

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

40302444 is a wasteful number, since it uses less digits than its factorization.

40302444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 209 counting only the distinct ones).

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

The square root of 40302444 is about 6348.4205909817. The cubic root of 40302444 is about 342.8549792522.

Adding to 40302444 its reverse (44420304), we get a palindrome (84722748).

The spelling of 40302444 in words is "forty million, three hundred two thousand, four hundred forty-four".