28326864 has 40 divisors (see below), whose sum is σ = 73914912. Its totient is φ = 9347200.

The previous prime is 28326841. The next prime is 28326871. The reversal of 28326864 is 46862382.

It is a super-2 number, since 2×28326864² = 1604822448148992, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1927 + ... + 7769.

Almost surely, 2^28326864 is an apocalyptic number.

28326864 is a gapful number since it is divisible by the number (24) 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 28326864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36957456).

28326864 is an abundant number, since it is smaller than the sum of its proper divisors (45588048).

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

28326864 is a wasteful number, since it uses less digits than its factorization.

28326864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5955 (or 5949 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 28326864 is about 5322.2987514795. The cubic root of 28326864 is about 304.8359379233.

The spelling of 28326864 in words is "twenty-eight million, three hundred twenty-six thousand, eight hundred sixty-four".