40302144 has 112 divisors (see below), whose sum is σ = 120335040. Its totient is φ = 13224960.

The previous prime is 40302127. The next prime is 40302203. The reversal of 40302144 is 44120304.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 143284 + ... + 143564.

It is an arithmetic number, because the mean of its divisors is an integer number (1074420).

Almost surely, 2^40302144 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 40302144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60167520).

40302144 is an abundant number, since it is smaller than the sum of its proper divisors (80032896).

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

40302144 is a wasteful number, since it uses less digits than its factorization.

40302144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40302144 is about 6348.3969630136. The cubic root of 40302144 is about 342.8541285449.

Adding to 40302144 its reverse (44120304), we get a palindrome (84422448).

The spelling of 40302144 in words is "forty million, three hundred two thousand, one hundred forty-four".