28406860 has 24 divisors (see below), whose sum is σ = 59764320. Its totient is φ = 11341824.

The previous prime is 28406839. The next prime is 28406879. The reversal of 28406860 is 6860482.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14457 + ... + 16303.

It is an arithmetic number, because the mean of its divisors is an integer number (2490180).

Almost surely, 2^28406860 is an apocalyptic number.

28406860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28406860 is an abundant number, since it is smaller than the sum of its proper divisors (31357460).

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

28406860 is a wasteful number, since it uses less digits than its factorization.

28406860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2625 (or 2623 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 28406860 is about 5329.8086269584. The cubic root of 28406860 is about 305.1226238096.

The spelling of 28406860 in words is "twenty-eight million, four hundred six thousand, eight hundred sixty".