28874142 has 24 divisors (see below), whose sum is σ = 68248440. Its totient is φ = 8749680.

The previous prime is 28874141. The next prime is 28874147. The reversal of 28874142 is 24147882.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28874097 and 28874106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28874141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72717 + ... + 73112.

It is an arithmetic number, because the mean of its divisors is an integer number (2843685).

Almost surely, 2^28874142 is an apocalyptic number.

28874142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28874142 is an abundant number, since it is smaller than the sum of its proper divisors (39374298).

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

28874142 is a wasteful number, since it uses less digits than its factorization.

28874142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145848 (or 145845 counting only the distinct ones).

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

The square root of 28874142 is about 5373.4664789128. The cubic root of 28874142 is about 306.7865832748.

The spelling of 28874142 in words is "twenty-eight million, eight hundred seventy-four thousand, one hundred forty-two".