28398670 has 16 divisors (see below), whose sum is σ = 54124848. Its totient is φ = 10691200.

The previous prime is 28398661. The next prime is 28398677. The reversal of 28398670 is 7689382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28398677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83356 + ... + 83695.

It is an arithmetic number, because the mean of its divisors is an integer number (3382803).

Almost surely, 2^28398670 is an apocalyptic number.

28398670 is a deficient number, since it is larger than the sum of its proper divisors (25726178).

28398670 is a wasteful number, since it uses less digits than its factorization.

28398670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167075.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28398670 is about 5329.0402513023. The cubic root of 28398670 is about 305.0932976247.

The spelling of 28398670 in words is "twenty-eight million, three hundred ninety-eight thousand, six hundred seventy".