40311144 has 24 divisors (see below), whose sum is σ = 109176210. Its totient is φ = 13437024.

The previous prime is 40311127. The next prime is 40311169. The reversal of 40311144 is 44111304.

It can be written as a sum of positive squares in only one way, i.e., 37970244 + 2340900 = 6162^2 + 1530^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 279867 + ... + 280010.

Almost surely, 2^40311144 is an apocalyptic number.

It is an amenable number.

40311144 is an abundant number, since it is smaller than the sum of its proper divisors (68865066).

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

40311144 is a wasteful number, since it uses less digits than its factorization.

40311144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559889 (or 559882 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 40311144 is about 6349.1057638064. The cubic root of 40311144 is about 342.8796479275.

Adding to 40311144 its reverse (44111304), we get a palindrome (84422448).

The spelling of 40311144 in words is "forty million, three hundred eleven thousand, one hundred forty-four".