28123098 has 16 divisors (see below), whose sum is σ = 58186080. Its totient is φ = 9051056.

The previous prime is 28123093. The next prime is 28123103. The reversal of 28123098 is 89032182.

It is an interprime number because it is at equal distance from previous prime (28123093) and next prime (28123103).

It is a super-2 number, since 2×28123098² = 1581817282235208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28123093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80640 + ... + 80987.

It is an arithmetic number, because the mean of its divisors is an integer number (3636630).

Almost surely, 2^28123098 is an apocalyptic number.

28123098 is an abundant number, since it is smaller than the sum of its proper divisors (30062982).

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

28123098 is a wasteful number, since it uses less digits than its factorization.

28123098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161661.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 28123098 is about 5303.1215335876. The cubic root of 28123098 is about 304.1032443067.

The spelling of 28123098 in words is "twenty-eight million, one hundred twenty-three thousand, ninety-eight".