28212416 has 28 divisors (see below), whose sum is σ = 58933080. Its totient is φ = 13363200.

The previous prime is 28212403. The next prime is 28212433. The reversal of 28212416 is 61421282.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10385 + ... + 12816.

Almost surely, 2^28212416 is an apocalyptic number.

It is an amenable number.

28212416 is an abundant number, since it is smaller than the sum of its proper divisors (30720664).

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

28212416 is a wasteful number, since it uses less digits than its factorization.

28212416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23232 (or 23222 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 28212416 is about 5311.5361243241. The cubic root of 28212416 is about 304.4248445932.

Adding to 28212416 its reverse (61421282), we get a palindrome (89633698).

The spelling of 28212416 in words is "twenty-eight million, two hundred twelve thousand, four hundred sixteen".