28296870 has 64 divisors (see below), whose sum is σ = 78299136. Its totient is φ = 6410880.

The previous prime is 28296869. The next prime is 28296889. The reversal of 28296870 is 7869282.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26140 + ... + 27200.

It is an arithmetic number, because the mean of its divisors is an integer number (1223424).

Almost surely, 2^28296870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28296870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39149568).

28296870 is an abundant number, since it is smaller than the sum of its proper divisors (50002266).

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

28296870 is a wasteful number, since it uses less digits than its factorization.

28296870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 28296870 is about 5319.4802377676. The cubic root of 28296870 is about 304.7283077229.

The spelling of 28296870 in words is "twenty-eight million, two hundred ninety-six thousand, eight hundred seventy".