28887942 has 24 divisors (see below), whose sum is σ = 60981336. Its totient is φ = 9121824.

The previous prime is 28887941. The next prime is 28887979. The reversal of 28887942 is 24978882.

28887942 is a modest number, since divided by 7942 gives 2888 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 28887891 and 28887900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28887941) by changing a digit.

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, 4503 + ... + 8834.

It is an arithmetic number, because the mean of its divisors is an integer number (2540889).

Almost surely, 2^28887942 is an apocalyptic number.

28887942 is an abundant number, since it is smaller than the sum of its proper divisors (32093394).

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

28887942 is a wasteful number, since it uses less digits than its factorization.

28887942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13380 (or 13361 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The square root of 28887942 is about 5374.7504128099. The cubic root of 28887942 is about 306.8354503033.

The spelling of 28887942 in words is "twenty-eight million, eight hundred eighty-seven thousand, nine hundred forty-two".