40363644 has 48 divisors (see below), whose sum is σ = 100257696. Its totient is φ = 12595200.

The previous prime is 40363613. The next prime is 40363663. The reversal of 40363644 is 44636304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48754 + ... + 49574.

It is an arithmetic number, because the mean of its divisors is an integer number (2088702).

Almost surely, 2^40363644 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 40363644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50128848).

40363644 is an abundant number, since it is smaller than the sum of its proper divisors (59894052).

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

40363644 is a wasteful number, since it uses less digits than its factorization.

40363644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086 (or 1084 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 40363644 is about 6353.2388590388. The cubic root of 40363644 is about 343.0284353400.

Adding to 40363644 its reverse (44636304), we get a palindrome (84999948).

The spelling of 40363644 in words is "forty million, three hundred sixty-three thousand, six hundred forty-four".