28212327 has 32 divisors (see below), whose sum is σ = 49109760. Its totient is φ = 15780960.

The previous prime is 28212323. The next prime is 28212341. The reversal of 28212327 is 72321282.

It is a happy number.

It is not a de Polignac number, because 28212327 - 2² = 28212323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 28212327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28212323) 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, 208 + ... + 7514.

It is an arithmetic number, because the mean of its divisors is an integer number (1534680).

Almost surely, 2^28212327 is an apocalyptic number.

28212327 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28212327 is a deficient number, since it is larger than the sum of its proper divisors (20897433).

28212327 is a wasteful number, since it uses less digits than its factorization.

28212327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7340 (or 7334 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 28212327 is about 5311.5277463269. The cubic root of 28212327 is about 304.4245244760.

The spelling of 28212327 in words is "twenty-eight million, two hundred twelve thousand, three hundred twenty-seven".