28899252 has 36 divisors (see below), whose sum is σ = 77349636. Its totient is φ = 9066240.

The previous prime is 28899251. The next prime is 28899259. The reversal of 28899252 is 25299882.

It can be written as a sum of positive squares in 2 ways, for example, as 14107536 + 14791716 = 3756^2 + 3846^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28899198 and 28899207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28899251) 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, 22999 + ... + 24222.

It is an arithmetic number, because the mean of its divisors is an integer number (2148601).

Almost surely, 2^28899252 is an apocalyptic number.

It is an amenable number.

28899252 is an abundant number, since it is smaller than the sum of its proper divisors (48450384).

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

28899252 is a wasteful number, since it uses less digits than its factorization.

28899252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47248 (or 47243 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 28899252 is about 5375.8024517276. The cubic root of 28899252 is about 306.8754884174.

The spelling of 28899252 in words is "twenty-eight million, eight hundred ninety-nine thousand, two hundred fifty-two".