28050990 has 64 divisors (see below), whose sum is σ = 74027520. Its totient is φ = 6746240.

The previous prime is 28050949. The next prime is 28050991. The reversal of 28050990 is 9905082.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28050991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54856 + ... + 55364.

It is an arithmetic number, because the mean of its divisors is an integer number (1156680).

Almost surely, 2^28050990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28050990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37013760).

28050990 is an abundant number, since it is smaller than the sum of its proper divisors (45976530).

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

28050990 is a wasteful number, since it uses less digits than its factorization.

28050990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 28050990 is about 5296.3185327169. The cubic root of 28050990 is about 303.8431135896.

The spelling of 28050990 in words is "twenty-eight million, fifty thousand, nine hundred ninety".