42819399 has 48 divisors (see below), whose sum is σ = 76377600. Its totient is φ = 22575168.

The previous prime is 42819383. The next prime is 42819433. The reversal of 42819399 is 99391824.

It is not a de Polignac number, because 42819399 - 2⁴ = 42819383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42819199) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41512 + ... + 42530.

It is an arithmetic number, because the mean of its divisors is an integer number (1591200).

Almost surely, 2^42819399 is an apocalyptic number.

42819399 is a deficient number, since it is larger than the sum of its proper divisors (33558201).

42819399 is a wasteful number, since it uses less digits than its factorization.

42819399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1081 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 42819399 is about 6543.6533373949. The cubic root of 42819399 is about 349.8486393140.

The spelling of 42819399 in words is "forty-two million, eight hundred nineteen thousand, three hundred ninety-nine".