28319634 has 24 divisors (see below), whose sum is σ = 70125120. Its totient is φ = 8091288.

The previous prime is 28319623. The next prime is 28319639. The reversal of 28319634 is 43691382.

28319634 is a `hidden beast` number, since 2 + 8 + 3 + 19 + 634 = 666.

It is not an unprimeable number, because it can be changed into a prime (28319639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112254 + ... + 112505.

It is an arithmetic number, because the mean of its divisors is an integer number (2921880).

Almost surely, 2^28319634 is an apocalyptic number.

28319634 is an abundant number, since it is smaller than the sum of its proper divisors (41805486).

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

28319634 is a wasteful number, since it uses less digits than its factorization.

28319634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224774 (or 224771 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 28319634 is about 5321.6194903431. The cubic root of 28319634 is about 304.8100008085.

The spelling of 28319634 in words is "twenty-eight million, three hundred nineteen thousand, six hundred thirty-four".