28784142 has 12 divisors (see below), whose sum is σ = 62365680. Its totient is φ = 9594708.

The previous prime is 28784123. The next prime is 28784143. The reversal of 28784142 is 24148782.

It is a junction number, because it is equal to n+sod(n) for n = 28784097 and 28784106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28784143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 799542 + ... + 799577.

It is an arithmetic number, because the mean of its divisors is an integer number (5197140).

Almost surely, 2^28784142 is an apocalyptic number.

28784142 is an abundant number, since it is smaller than the sum of its proper divisors (33581538).

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

28784142 is a wasteful number, since it uses less digits than its factorization.

28784142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599127 (or 1599124 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 28784142 is about 5365.0854606427. The cubic root of 28784142 is about 306.4675027441.

The spelling of 28784142 in words is "twenty-eight million, seven hundred eighty-four thousand, one hundred forty-two".