28959860 has 24 divisors (see below), whose sum is σ = 61043976. Its totient is φ = 11540480.

The previous prime is 28959841. The next prime is 28959877. The reversal of 28959860 is 6895982.

It can be written as a sum of positive squares in 4 ways, for example, as 6130576 + 22829284 = 2476^2 + 4778^2 .

It is a congruent number.

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, 3044 + ... + 8196.

It is an arithmetic number, because the mean of its divisors is an integer number (2543499).

Almost surely, 2^28959860 is an apocalyptic number.

28959860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28959860 is an abundant number, since it is smaller than the sum of its proper divisors (32084116).

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

28959860 is a wasteful number, since it uses less digits than its factorization.

28959860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5443 (or 5441 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 28959860 is about 5381.4366111662. The cubic root of 28959860 is about 307.0898667758.

The spelling of 28959860 in words is "twenty-eight million, nine hundred fifty-nine thousand, eight hundred sixty".