40245144 has 32 divisors (see below), whose sum is σ = 100768320. Its totient is φ = 13394336.

The previous prime is 40245133. The next prime is 40245181. The reversal of 40245144 is 44154204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30139 + ... + 31445.

It is an arithmetic number, because the mean of its divisors is an integer number (3149010).

Almost surely, 2^40245144 is an apocalyptic number.

It is an amenable number.

40245144 is an abundant number, since it is smaller than the sum of its proper divisors (60523176).

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

40245144 is a wasteful number, since it uses less digits than its factorization.

40245144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599 (or 2595 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 40245144 is about 6343.9060522678. The cubic root of 40245144 is about 342.6924174975.

Adding to 40245144 its reverse (44154204), we get a palindrome (84399348).

The spelling of 40245144 in words is "forty million, two hundred forty-five thousand, one hundred forty-four".