28428132 has 24 divisors (see below), whose sum is σ = 66419136. Its totient is φ = 9463648.

The previous prime is 28428121. The next prime is 28428143. The reversal of 28428132 is 23182482.

It is an interprime number because it is at equal distance from previous prime (28428121) and next prime (28428143).

It is a self number, because there is not a number n which added to its sum of digits gives 28428132.

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 7 ways as a sum of consecutive naturals, for example, 15538 + ... + 17270.

It is an arithmetic number, because the mean of its divisors is an integer number (2767464).

Almost surely, 2^28428132 is an apocalyptic number.

It is an amenable number.

28428132 is an abundant number, since it is smaller than the sum of its proper divisors (37991004).

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

28428132 is a wasteful number, since it uses less digits than its factorization.

28428132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107 (or 3105 counting only the distinct ones).

The product of its digits is 6144, while the sum is 30.

The square root of 28428132 is about 5331.8038223476. The cubic root of 28428132 is about 305.1987667907.

The spelling of 28428132 in words is "twenty-eight million, four hundred twenty-eight thousand, one hundred thirty-two".