28315398 has 16 divisors (see below), whose sum is σ = 57591360. Its totient is φ = 9278376.

The previous prime is 28315381. The next prime is 28315423. The reversal of 28315398 is 89351382.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39640 + ... + 40347.

It is an arithmetic number, because the mean of its divisors is an integer number (3599460).

Almost surely, 2^28315398 is an apocalyptic number.

28315398 is an abundant number, since it is smaller than the sum of its proper divisors (29275962).

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

28315398 is a wasteful number, since it uses less digits than its factorization.

28315398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80051.

The product of its digits is 51840, while the sum is 39.

The square root of 28315398 is about 5321.2214763154. The cubic root of 28315398 is about 304.7948024065.

The spelling of 28315398 in words is "twenty-eight million, three hundred fifteen thousand, three hundred ninety-eight".