28894530 has 32 divisors (see below), whose sum is σ = 79254144. Its totient is φ = 6604416.

The previous prime is 28894529. The next prime is 28894549. The reversal of 28894530 is 3549882.

28894530 = 383² + 384² + ... + 522².

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68587 + ... + 69006.

It is an arithmetic number, because the mean of its divisors is an integer number (2476692).

Almost surely, 2^28894530 is an apocalyptic number.

28894530 is an abundant number, since it is smaller than the sum of its proper divisors (50359614).

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

28894530 is a wasteful number, since it uses less digits than its factorization.

28894530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137610.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 28894530 is about 5375.3632435399. The cubic root of 28894530 is about 306.8587735097.

The spelling of 28894530 in words is "twenty-eight million, eight hundred ninety-four thousand, five hundred thirty".