28398460 has 48 divisors (see below), whose sum is σ = 61762176. Its totient is φ = 10962432.

The previous prime is 28398443. The next prime is 28398467. The reversal of 28398460 is 6489382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28398467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77197 + ... + 77563.

It is an arithmetic number, because the mean of its divisors is an integer number (1286712).

Almost surely, 2^28398460 is an apocalyptic number.

28398460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28398460 is an abundant number, since it is smaller than the sum of its proper divisors (33363716).

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

28398460 is a wasteful number, since it uses less digits than its factorization.

28398460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 28398460 is about 5329.0205479056. The cubic root of 28398460 is about 305.0925455971.

The spelling of 28398460 in words is "twenty-eight million, three hundred ninety-eight thousand, four hundred sixty".