40205442 has 32 divisors (see below), whose sum is σ = 85508352. Its totient is φ = 12559104.

The previous prime is 40205441. The next prime is 40205447. The reversal of 40205442 is 24450204.

It is not an unprimeable number, because it can be changed into a prime (40205441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27543 + ... + 28965.

It is an arithmetic number, because the mean of its divisors is an integer number (2672136).

Almost surely, 2^40205442 is an apocalyptic number.

40205442 is an abundant number, since it is smaller than the sum of its proper divisors (45302910).

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

40205442 is a wasteful number, since it uses less digits than its factorization.

40205442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 40205442 is about 6340.7761354585. The cubic root of 40205442 is about 342.5796912616.

Adding to 40205442 its reverse (24450204), we get a palindrome (64655646).

The spelling of 40205442 in words is "forty million, two hundred five thousand, four hundred forty-two".