28706860 has 48 divisors (see below), whose sum is σ = 74200896. Its totient is φ = 9084672.

The previous prime is 28706833. The next prime is 28706879. The reversal of 28706860 is 6860782.

28706860 = T₂₀₁ + T₂₀₂ + ... + T₅₆₄.

It is a super-2 number, since 2×28706860² = 1648167622119200, which contains 22 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, 6067 + ... + 9706.

It is an arithmetic number, because the mean of its divisors is an integer number (1545852).

Almost surely, 2^28706860 is an apocalyptic number.

28706860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28706860 is an abundant number, since it is smaller than the sum of its proper divisors (45494036).

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

28706860 is a wasteful number, since it uses less digits than its factorization.

28706860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15802 (or 15800 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 28706860 is about 5357.8783114214. The cubic root of 28706860 is about 306.1929806381.

It can be divided in two parts, 2870 and 6860, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 28706860 in words is "twenty-eight million, seven hundred six thousand, eight hundred sixty".