28213952 has 28 divisors (see below), whose sum is σ = 60295536. Its totient is φ = 13021440.

The previous prime is 28213949. The next prime is 28213957. The reversal of 28213952 is 25931282.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (28213957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16124 + ... + 17787.

It is an arithmetic number, because the mean of its divisors is an integer number (2153412).

Almost surely, 2^28213952 is an apocalyptic number.

It is an amenable number.

28213952 is an abundant number, since it is smaller than the sum of its proper divisors (32081584).

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

28213952 is a wasteful number, since it uses less digits than its factorization.

28213952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33936 (or 33926 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 28213952 is about 5311.6807132959. The cubic root of 28213952 is about 304.4303692066.

The spelling of 28213952 in words is "twenty-eight million, two hundred thirteen thousand, nine hundred fifty-two".