40542404 has 36 divisors (see below), whose sum is σ = 83215440. Its totient is φ = 17231760.

The previous prime is 40542401. The next prime is 40542419. The reversal of 40542404 is 40424504.

It is a self number, because there is not a number n which added to its sum of digits gives 40542404.

It is not an unprimeable number, because it can be changed into a prime (40542401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24887 + ... + 26465.

It is an arithmetic number, because the mean of its divisors is an integer number (2311540).

Almost surely, 2^40542404 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 40542404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41607720).

40542404 is an abundant number, since it is smaller than the sum of its proper divisors (42673036).

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

40542404 is a wasteful number, since it uses less digits than its factorization.

40542404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728 (or 1719 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 40542404 is about 6367.2917319689. The cubic root of 40542404 is about 343.5340839555.

Adding to 40542404 its reverse (40424504), we get a palindrome (80966908).

The spelling of 40542404 in words is "forty million, five hundred forty-two thousand, four hundred four".