28730826 has 24 divisors (see below), whose sum is σ = 62358660. Its totient is φ = 9560256.

The previous prime is 28730813. The next prime is 28730861. The reversal of 28730826 is 62803782.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28611801 + 119025 = 5349^2 + 345^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13576 + ... + 15548.

Almost surely, 2^28730826 is an apocalyptic number.

28730826 is an abundant number, since it is smaller than the sum of its proper divisors (33627834).

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

28730826 is a wasteful number, since it uses less digits than its factorization.

28730826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2790 (or 2787 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28730826 is about 5360.1143644516. The cubic root of 28730826 is about 306.2781656172.

It can be divided in two parts, 287 and 30826, that added together give a palindrome (31113).

The spelling of 28730826 in words is "twenty-eight million, seven hundred thirty thousand, eight hundred twenty-six".