28516830 has 32 divisors (see below), whose sum is σ = 68580864. Its totient is φ = 7588896.

The previous prime is 28516819. The next prime is 28516841. The reversal of 28516830 is 3861582.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28516819) and next prime (28516841).

It is a junction number, because it is equal to n+sod(n) for n = 28516791 and 28516800.

It is a congruent number.

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, 28519 + ... + 29501.

It is an arithmetic number, because the mean of its divisors is an integer number (2143152).

Almost surely, 2^28516830 is an apocalyptic number.

28516830 is an abundant number, since it is smaller than the sum of its proper divisors (40064034).

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

28516830 is a wasteful number, since it uses less digits than its factorization.

28516830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 28516830 is about 5340.1151672974. The cubic root of 28516830 is about 305.5158519333.

The spelling of 28516830 in words is "twenty-eight million, five hundred sixteen thousand, eight hundred thirty".