28215027 has 16 divisors (see below), whose sum is σ = 42590880. Its totient is φ = 18454176.

The previous prime is 28215017. The next prime is 28215029. The reversal of 28215027 is 72051282.

It is not a de Polignac number, because 28215027 - 2¹⁶ = 28149491 is a prime.

It is a super-2 number, since 2×28215027² = 1592175497221458, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (28215029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8428 + ... + 11289.

It is an arithmetic number, because the mean of its divisors is an integer number (2661930).

Almost surely, 2^28215027 is an apocalyptic number.

28215027 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28215027 is a deficient number, since it is larger than the sum of its proper divisors (14375853).

28215027 is a wasteful number, since it uses less digits than its factorization.

28215027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19779 (or 19773 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28215027 is about 5311.7819044084. The cubic root of 28215027 is about 304.4342355974.

The spelling of 28215027 in words is "twenty-eight million, two hundred fifteen thousand, twenty-seven".