28530348 has 108 divisors (see below), whose sum is σ = 85331736. Its totient is φ = 7392000.

The previous prime is 28530347. The next prime is 28530349. The reversal of 28530348 is 84303582.

It is an interprime number because it is at equal distance from previous prime (28530347) and next prime (28530349).

It is a super-2 number, since 2×28530348² = 1627961514002208, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (28530347) 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, 70948 + ... + 71348.

Almost surely, 2^28530348 is an apocalyptic number.

28530348 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28530348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42665868).

28530348 is an abundant number, since it is smaller than the sum of its proper divisors (56801388).

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

28530348 is a wasteful number, since it uses less digits than its factorization.

28530348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 28530348 is about 5341.3807203756. The cubic root of 28530348 is about 305.5641194637.

The spelling of 28530348 in words is "twenty-eight million, five hundred thirty thousand, three hundred forty-eight".