28106724 has 12 divisors (see below), whose sum is σ = 65582384. Its totient is φ = 9368904.

The previous prime is 28106723. The next prime is 28106731. The reversal of 28106724 is 42760182.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 28106691 and 28106700.

It is not an unprimeable number, because it can be changed into a prime (28106723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171102 + ... + 1171125.

Almost surely, 2^28106724 is an apocalyptic number.

It is an amenable number.

28106724 is an abundant number, since it is smaller than the sum of its proper divisors (37475660).

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

28106724 is a wasteful number, since it uses less digits than its factorization.

28106724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342234 (or 2342232 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28106724 is about 5301.5775010840. The cubic root of 28106724 is about 304.0442139062.

The spelling of 28106724 in words is "twenty-eight million, one hundred six thousand, seven hundred twenty-four".