28750212 has 36 divisors (see below), whose sum is σ = 72896460. Its totient is φ = 9554112.

The previous prime is 28750201. The next prime is 28750217. The reversal of 28750212 is 21205782.

It can be written as a sum of positive squares in 2 ways, for example, as 10653696 + 18096516 = 3264^2 + 4254^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28750217) 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, 12978 + ... + 15030.

Almost surely, 2^28750212 is an apocalyptic number.

It is an amenable number.

28750212 is an abundant number, since it is smaller than the sum of its proper divisors (44146248).

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

28750212 is a wasteful number, since it uses less digits than its factorization.

28750212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28750212 is about 5361.9224164473. The cubic root of 28750212 is about 306.3470367499.

Adding to 28750212 its reverse (21205782), we get a palindrome (49955994).

The spelling of 28750212 in words is "twenty-eight million, seven hundred fifty thousand, two hundred twelve".