28247769 has 24 divisors (see below), whose sum is σ = 46051200. Its totient is φ = 16527840.

The previous prime is 28247767. The next prime is 28247771. The reversal of 28247769 is 96774282.

It is an interprime number because it is at equal distance from previous prime (28247767) and next prime (28247771).

It is not a de Polignac number, because 28247769 - 2¹ = 28247767 is a prime.

It is a super-2 number, since 2×28247769² = 1595872906954722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28247767) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2049 + ... + 7790.

It is an arithmetic number, because the mean of its divisors is an integer number (1918800).

Almost surely, 2^28247769 is an apocalyptic number.

28247769 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28247769 is a deficient number, since it is larger than the sum of its proper divisors (17803431).

28247769 is a wasteful number, since it uses less digits than its factorization.

28247769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9885 (or 9882 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 28247769 is about 5314.8630273978. The cubic root of 28247769 is about 304.5519498510.

The spelling of 28247769 in words is "twenty-eight million, two hundred forty-seven thousand, seven hundred sixty-nine".