40540784 has 40 divisors (see below), whose sum is σ = 83967840. Its totient is φ = 18894848.

The previous prime is 40540781. The next prime is 40540807. The reversal of 40540784 is 48704504.

It is a self number, because there is not a number n which added to its sum of digits gives 40540784.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40540781) 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, 30077 + ... + 31395.

It is an arithmetic number, because the mean of its divisors is an integer number (2099196).

Almost surely, 2^40540784 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 40540784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41983920).

40540784 is an abundant number, since it is smaller than the sum of its proper divisors (43427056).

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

40540784 is a wasteful number, since it uses less digits than its factorization.

40540784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457 (or 1451 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 40540784 is about 6367.1645180567. The cubic root of 40540784 is about 343.5295082309.

The spelling of 40540784 in words is "forty million, five hundred forty thousand, seven hundred eighty-four".