28385586 has 32 divisors (see below), whose sum is σ = 64788480. Its totient is φ = 9205488.

The previous prime is 28385579. The next prime is 28385627. The reversal of 28385586 is 68558382.

It is a happy number.

It is a super-3 number, since 3×28385586³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5106 + ... + 9101.

It is an arithmetic number, because the mean of its divisors is an integer number (2024640).

Almost surely, 2^28385586 is an apocalyptic number.

28385586 is an abundant number, since it is smaller than the sum of its proper divisors (36402894).

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

28385586 is a wasteful number, since it uses less digits than its factorization.

28385586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14255 (or 14249 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 28385586 is about 5327.8124967007. The cubic root of 28385586 is about 305.0464356424.

The spelling of 28385586 in words is "twenty-eight million, three hundred eighty-five thousand, five hundred eighty-six".