28727292 has 48 divisors (see below), whose sum is σ = 73446912. Its totient is φ = 8666880.

The previous prime is 28727287. The next prime is 28727327. The reversal of 28727292 is 29272782.

It is a self number, because there is not a number n which added to its sum of digits gives 28727292.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48148 + ... + 48740.

It is an arithmetic number, because the mean of its divisors is an integer number (1530144).

Almost surely, 2^28727292 is an apocalyptic number.

28727292 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28727292 is an abundant number, since it is smaller than the sum of its proper divisors (44719620).

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

28727292 is a wasteful number, since it uses less digits than its factorization.

28727292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978 (or 976 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 28727292 is about 5359.7846971683. The cubic root of 28727292 is about 306.2656073123.

Subtracting 28727292 from its reverse (29272782), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 28727292 in words is "twenty-eight million, seven hundred twenty-seven thousand, two hundred ninety-two".