28238964 has 24 divisors (see below), whose sum is σ = 70959840. Its totient is φ = 8688864.

The previous prime is 28238933. The next prime is 28238971. The reversal of 28238964 is 46983282.

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, 90354 + ... + 90665.

It is an arithmetic number, because the mean of its divisors is an integer number (2956660).

Almost surely, 2^28238964 is an apocalyptic number.

It is an amenable number.

28238964 is an abundant number, since it is smaller than the sum of its proper divisors (42720876).

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

28238964 is a wasteful number, since it uses less digits than its factorization.

28238964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181039 (or 181037 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 28238964 is about 5314.0346254047. The cubic root of 28238964 is about 304.5203030026.

The spelling of 28238964 in words is "twenty-eight million, two hundred thirty-eight thousand, nine hundred sixty-four".