28747242 has 12 divisors (see below), whose sum is σ = 62285730. Its totient is φ = 9582408.

The previous prime is 28747189. The next prime is 28747259. The reversal of 28747242 is 24274782.

It can be written as a sum of positive squares in only one way, i.e., 27468081 + 1279161 = 5241^2 + 1131^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28747197 and 28747206.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 798517 + ... + 798552.

Almost surely, 2^28747242 is an apocalyptic number.

28747242 is an abundant number, since it is smaller than the sum of its proper divisors (33538488).

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

28747242 is a wasteful number, since it uses less digits than its factorization.

28747242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597077 (or 1597074 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 28747242 is about 5361.6454563874. The cubic root of 28747242 is about 306.3364874708.

The spelling of 28747242 in words is "twenty-eight million, seven hundred forty-seven thousand, two hundred forty-two".