28949312 has 84 divisors (see below), whose sum is σ = 69677280. Its totient is φ = 11688192.

The previous prime is 28949309. The next prime is 28949329. The reversal of 28949312 is 21394982.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161639 + ... + 161817.

Almost surely, 2^28949312 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 28949312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34838640).

28949312 is an abundant number, since it is smaller than the sum of its proper divisors (40727968).

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

28949312 is a wasteful number, since it uses less digits than its factorization.

28949312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 207 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 28949312 is about 5380.4564862101. The cubic root of 28949312 is about 307.0525786436.

The spelling of 28949312 in words is "twenty-eight million, nine hundred forty-nine thousand, three hundred twelve".