28017770 has 32 divisors (see below), whose sum is σ = 56920320. Its totient is φ = 9835840.

The previous prime is 28017767. The next prime is 28017791. The reversal of 28017770 is 7771082.

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, 1202 + ... + 7581.

It is an arithmetic number, because the mean of its divisors is an integer number (1778760).

Almost surely, 2^28017770 is an apocalyptic number.

28017770 is an abundant number, since it is smaller than the sum of its proper divisors (28902550).

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

28017770 is a wasteful number, since it uses less digits than its factorization.

28017770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8830.

The product of its (nonzero) digits is 5488, while the sum is 32.

The square root of 28017770 is about 5293.1814629767. The cubic root of 28017770 is about 303.7231219196.

The spelling of 28017770 in words is "twenty-eight million, seventeen thousand, seven hundred seventy".