28130910 has 64 divisors (see below), whose sum is σ = 70170624. Its totient is φ = 7212800.

The previous prime is 28130891. The next prime is 28130911. The reversal of 28130910 is 1903182.

It is a super-3 number, since 3×28130910³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28130911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99970 + ... + 100250.

It is an arithmetic number, because the mean of its divisors is an integer number (1096416).

Almost surely, 2^28130910 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28130910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35085312).

28130910 is an abundant number, since it is smaller than the sum of its proper divisors (42039714).

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

28130910 is a wasteful number, since it uses less digits than its factorization.

28130910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 28130910 is about 5303.8580297742. The cubic root of 28130910 is about 304.1313995098.

The spelling of 28130910 in words is "twenty-eight million, one hundred thirty thousand, nine hundred ten".