42403988 has 24 divisors (see below), whose sum is σ = 81238080. Its totient is φ = 19206720.

The previous prime is 42403981. The next prime is 42404017. The reversal of 42403988 is 88930424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42403981) 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, 12233 + ... + 15311.

It is an arithmetic number, because the mean of its divisors is an integer number (3384920).

Almost surely, 2^42403988 is an apocalyptic number.

It is an amenable number.

42403988 is a deficient number, since it is larger than the sum of its proper divisors (38834092).

42403988 is a wasteful number, since it uses less digits than its factorization.

42403988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407 (or 3405 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 42403988 is about 6511.8344573553. The cubic root of 42403988 is about 348.7136125069.

It can be divided in two parts, 4240 and 3988, that added together give a palindrome (8228).

The spelling of 42403988 in words is "forty-two million, four hundred three thousand, nine hundred eighty-eight".