40431284 has 24 divisors (see below), whose sum is σ = 73056480. Its totient is φ = 19568736.

The previous prime is 40431283. The next prime is 40431317. The reversal of 40431284 is 48213404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40431283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14534 + ... + 17090.

It is an arithmetic number, because the mean of its divisors is an integer number (3044020).

Almost surely, 2^40431284 is an apocalyptic number.

It is an amenable number.

40431284 is a deficient number, since it is larger than the sum of its proper divisors (32625196).

40431284 is a wasteful number, since it uses less digits than its factorization.

40431284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687 (or 2685 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 40431284 is about 6358.5598998515. The cubic root of 40431284 is about 343.2199401408.

Adding to 40431284 its reverse (48213404), we get a palindrome (88644688).

The spelling of 40431284 in words is "forty million, four hundred thirty-one thousand, two hundred eighty-four".