42878899 has 16 divisors (see below), whose sum is σ = 50918400. Its totient is φ = 35361672.

The previous prime is 42878887. The next prime is 42878903. The reversal of 42878899 is 99887824.

It is not a de Polignac number, because 42878899 - 2⁹ = 42878387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42878299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726732 + ... + 726790.

It is an arithmetic number, because the mean of its divisors is an integer number (3182400).

Almost surely, 2^42878899 is an apocalyptic number.

42878899 is a deficient number, since it is larger than the sum of its proper divisors (8039501).

42878899 is an frugal number, since it uses more digits than its factorization.

42878899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 113 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 55.

The square root of 42878899 is about 6548.1981491094. The cubic root of 42878899 is about 350.0106092022.

The spelling of 42878899 in words is "forty-two million, eight hundred seventy-eight thousand, eight hundred ninety-nine".