28201050 has 72 divisors (see below), whose sum is σ = 78415740. Its totient is φ = 7257600.

The previous prime is 28201049. The next prime is 28201051. The reversal of 28201050 is 5010282.

It is an interprime number because it is at equal distance from previous prime (28201049) and next prime (28201051).

It can be written as a sum of positive squares in 6 ways, for example, as 12257001 + 15944049 = 3501^2 + 3993^2 .

It is a super-2 number, since 2×28201050² = 1590598442205000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (28201051) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11970 + ... + 14130.

Almost surely, 2^28201050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28201050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39207870).

28201050 is an abundant number, since it is smaller than the sum of its proper divisors (50214690).

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

28201050 is a wasteful number, since it uses less digits than its factorization.

28201050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208 (or 2200 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 28201050 is about 5310.4660812400. The cubic root of 28201050 is about 304.3839576595.

The spelling of 28201050 in words is "twenty-eight million, two hundred one thousand, fifty".