28899792 has 60 divisors (see below), whose sum is σ = 81752580. Its totient is φ = 9529344.

The previous prime is 28899791. The next prime is 28899833. The reversal of 28899792 is 29799882.

It can be written as a sum of positive squares in 2 ways, for example, as 8433216 + 20466576 = 2904^2 + 4524^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28899791) 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, 12934 + ... + 15002.

It is an arithmetic number, because the mean of its divisors is an integer number (1362543).

Almost surely, 2^28899792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28899792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40876290).

28899792 is an abundant number, since it is smaller than the sum of its proper divisors (52852788).

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

28899792 is a wasteful number, since it uses less digits than its factorization.

28899792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2180 (or 2171 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 28899792 is about 5375.8526765528. The cubic root of 28899792 is about 306.8773997901.

The spelling of 28899792 in words is "twenty-eight million, eight hundred ninety-nine thousand, seven hundred ninety-two".