42000440 has 16 divisors (see below), whose sum is σ = 94501080. Its totient is φ = 16800160.

The previous prime is 42000419. The next prime is 42000457. The reversal of 42000440 is 4400024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524966 + ... + 525045.

Almost surely, 2^42000440 is an apocalyptic number.

42000440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42000440 is an abundant number, since it is smaller than the sum of its proper divisors (52500640).

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

42000440 is a wasteful number, since it uses less digits than its factorization.

42000440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050022 (or 1050018 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 42000440 is about 6480.7746450559. The cubic root of 42000440 is about 347.6038783350.

Adding to 42000440 its reverse (4400024), we get a palindrome (46400464).

The spelling of 42000440 in words is "forty-two million, four hundred forty", and thus it is an aban number.