28013292 has 36 divisors (see below), whose sum is σ = 72728656. Its totient is φ = 9084960.

The previous prime is 28013261. The next prime is 28013311. The reversal of 28013292 is 29231082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9184 + ... + 11847.

Almost surely, 2^28013292 is an apocalyptic number.

It is an amenable number.

28013292 is an abundant number, since it is smaller than the sum of its proper divisors (44715364).

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

28013292 is a wasteful number, since it uses less digits than its factorization.

28013292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21078 (or 21073 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28013292 is about 5292.7584490509. The cubic root of 28013292 is about 303.7069399917.

The spelling of 28013292 in words is "twenty-eight million, thirteen thousand, two hundred ninety-two".