28199142 has 24 divisors (see below), whose sum is σ = 62520744. Its totient is φ = 9180864.

The previous prime is 28199137. The next prime is 28199153. The reversal of 28199142 is 24199182.

It is a junction number, because it is equal to n+sod(n) for n = 28199097 and 28199106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17443 + ... + 18990.

It is an arithmetic number, because the mean of its divisors is an integer number (2605031).

Almost surely, 2^28199142 is an apocalyptic number.

28199142 is an abundant number, since it is smaller than the sum of its proper divisors (34321602).

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

28199142 is a wasteful number, since it uses less digits than its factorization.

28199142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36484 (or 36481 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 28199142 is about 5310.2864329526. The cubic root of 28199142 is about 304.3770929306.

The spelling of 28199142 in words is "twenty-eight million, one hundred ninety-nine thousand, one hundred forty-two".