28821950 has 12 divisors (see below), whose sum is σ = 53608920. Its totient is φ = 11528760.

The previous prime is 28821941. The next prime is 28821959. The reversal of 28821950 is 5912882.

It is an interprime number because it is at equal distance from previous prime (28821941) and next prime (28821959).

It is a self number, because there is not a number n which added to its sum of digits gives 28821950.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28821959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 288170 + ... + 288269.

It is an arithmetic number, because the mean of its divisors is an integer number (4467410).

Almost surely, 2^28821950 is an apocalyptic number.

28821950 is a deficient number, since it is larger than the sum of its proper divisors (24786970).

28821950 is a wasteful number, since it uses less digits than its factorization.

28821950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576451 (or 576446 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 28821950 is about 5368.6078269883. The cubic root of 28821950 is about 306.6016258305.

The spelling of 28821950 in words is "twenty-eight million, eight hundred twenty-one thousand, nine hundred fifty".