40640124 has 24 divisors (see below), whose sum is σ = 108373888. Its totient is φ = 11611440.

The previous prime is 40640113. The next prime is 40640129. The reversal of 40640124 is 42104604.

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 40640124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241822 + ... + 241989.

Almost surely, 2^40640124 is an apocalyptic number.

It is an amenable number.

40640124 is an abundant number, since it is smaller than the sum of its proper divisors (67733764).

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

40640124 is a wasteful number, since it uses less digits than its factorization.

40640124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483825 (or 483823 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 40640124 is about 6374.9607057613. The cubic root of 40640124 is about 343.8098710482.

Adding to 40640124 its reverse (42104604), we get a palindrome (82744728).

The spelling of 40640124 in words is "forty million, six hundred forty thousand, one hundred twenty-four".