28465860 has 48 divisors (see below), whose sum is σ = 80309376. Its totient is φ = 7533312.

The previous prime is 28465859. The next prime is 28465861. The reversal of 28465860 is 6856482.

It is an interprime number because it is at equal distance from previous prime (28465859) and next prime (28465861).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28465861) 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, 6489 + ... + 9951.

It is an arithmetic number, because the mean of its divisors is an integer number (1673112).

Almost surely, 2^28465860 is an apocalyptic number.

28465860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28465860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40154688).

28465860 is an abundant number, since it is smaller than the sum of its proper divisors (51843516).

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

28465860 is a wasteful number, since it uses less digits than its factorization.

28465860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612 (or 3610 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 28465860 is about 5335.3406639127. The cubic root of 28465860 is about 305.3337205405. Note that the first 3 decimals are identical.

The spelling of 28465860 in words is "twenty-eight million, four hundred sixty-five thousand, eight hundred sixty".