40421240 has 32 divisors (see below), whose sum is σ = 96299280. Its totient is φ = 15217152.

The previous prime is 40421239. The next prime is 40421263. The reversal of 40421240 is 4212404.

40421240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29042 + ... + 30401.

Almost surely, 2^40421240 is an apocalyptic number.

40421240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40421240 is an abundant number, since it is smaller than the sum of its proper divisors (55878040).

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

40421240 is a wasteful number, since it uses less digits than its factorization.

40421240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59471 (or 59467 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 40421240 is about 6357.7700493176. The cubic root of 40421240 is about 343.1915167168.

Adding to 40421240 its reverse (4212404), we get a palindrome (44633644).

The spelling of 40421240 in words is "forty million, four hundred twenty-one thousand, two hundred forty".