40020540 has 48 divisors (see below), whose sum is σ = 128067072. Its totient is φ = 9147456.

The previous prime is 40020527. The next prime is 40020599. The reversal of 40020540 is 4502004.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 47224 + ... + 48063.

It is an arithmetic number, because the mean of its divisors is an integer number (2668064).

Almost surely, 2^40020540 is an apocalyptic number.

It is an amenable number.

40020540 is an abundant number, since it is smaller than the sum of its proper divisors (88046532).

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

40020540 is a wasteful number, since it uses less digits than its factorization.

40020540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95306 (or 95304 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 40020540 is about 6326.1789415096. The cubic root of 40020540 is about 342.0537174950.

Adding to 40020540 its reverse (4502004), we get a palindrome (44522544).

The spelling of 40020540 in words is "forty million, twenty thousand, five hundred forty".