28632870 has 96 divisors (see below), whose sum is σ = 86980608. Its totient is φ = 6398784.

The previous prime is 28632859. The next prime is 28632893. The reversal of 28632870 is 7823682.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29127 + ... + 30093.

It is an arithmetic number, because the mean of its divisors is an integer number (906048).

Almost surely, 2^28632870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28632870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43490304).

28632870 is an abundant number, since it is smaller than the sum of its proper divisors (58347738).

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

28632870 is a wasteful number, since it uses less digits than its factorization.

28632870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28632870 is about 5350.9690711123. The cubic root of 28632870 is about 305.9296903693.

The spelling of 28632870 in words is "twenty-eight million, six hundred thirty-two thousand, eight hundred seventy".