40240434 has 32 divisors (see below), whose sum is σ = 88792704. Its totient is φ = 12078720.

The previous prime is 40240433. The next prime is 40240441. The reversal of 40240434 is 43404204.

It is a self number, because there is not a number n which added to its sum of digits gives 40240434.

It is not an unprimeable number, because it can be changed into a prime (40240433) 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, 3094 + ... + 9489.

It is an arithmetic number, because the mean of its divisors is an integer number (2774772).

Almost surely, 2^40240434 is an apocalyptic number.

40240434 is an abundant number, since it is smaller than the sum of its proper divisors (48552270).

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

40240434 is a wasteful number, since it uses less digits than its factorization.

40240434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12642.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 40240434 is about 6343.5348190106. The cubic root of 40240434 is about 342.6790482303.

Adding to 40240434 its reverse (43404204), we get a palindrome (83644638).

The spelling of 40240434 in words is "forty million, two hundred forty thousand, four hundred thirty-four".