40215234 has 64 divisors (see below), whose sum is σ = 89299584. Its totient is φ = 12020736.

The previous prime is 40215233. The next prime is 40215239. The reversal of 40215234 is 43251204.

It is a self number, because there is not a number n which added to its sum of digits gives 40215234.

It is not an unprimeable number, because it can be changed into a prime (40215233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232372 + ... + 232544.

It is an arithmetic number, because the mean of its divisors is an integer number (1395306).

Almost surely, 2^40215234 is an apocalyptic number.

40215234 is an abundant number, since it is smaller than the sum of its proper divisors (49084350).

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

40215234 is a wasteful number, since it uses less digits than its factorization.

40215234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40215234 is about 6341.5482336729. The cubic root of 40215234 is about 342.6075006648.

Adding to 40215234 its reverse (43251204), we get a palindrome (83466438).

The spelling of 40215234 in words is "forty million, two hundred fifteen thousand, two hundred thirty-four".