42388799 has 4 divisors (see below), whose sum is σ = 42785064. Its totient is φ = 41992536.

The previous prime is 42388789. The next prime is 42388813. The reversal of 42388799 is 99788324.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42388799 - 2⁸ = 42388543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42388729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197972 + ... + 198185.

It is an arithmetic number, because the mean of its divisors is an integer number (10696266).

Almost surely, 2^42388799 is an apocalyptic number.

42388799 is a deficient number, since it is larger than the sum of its proper divisors (396265).

42388799 is a wasteful number, since it uses less digits than its factorization.

42388799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396264.

The product of its digits is 870912, while the sum is 50.

The square root of 42388799 is about 6510.6680916785. The cubic root of 42388799 is about 348.6719714267.

The spelling of 42388799 in words is "forty-two million, three hundred eighty-eight thousand, seven hundred ninety-nine".