28213376 has 32 divisors (see below), whose sum is σ = 56512080. Its totient is φ = 14030080.

The previous prime is 28213373. The next prime is 28213391. The reversal of 28213376 is 67331282.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (28213373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28571 + ... + 29541.

Almost surely, 2^28213376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28213376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28256040).

28213376 is an abundant number, since it is smaller than the sum of its proper divisors (28298704).

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

28213376 is an equidigital number, since it uses as much as digits as its factorization.

28213376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212 (or 1200 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 28213376 is about 5311.6264928927. The cubic root of 28213376 is about 304.4282975001.

The spelling of 28213376 in words is "twenty-eight million, two hundred thirteen thousand, three hundred seventy-six".