28653138 has 12 divisors (see below), whose sum is σ = 62081838. Its totient is φ = 9551040.

The previous prime is 28653113. The next prime is 28653151. The reversal of 28653138 is 83135682.

It can be written as a sum of positive squares in only one way, i.e., 26656569 + 1996569 = 5163^2 + 1413^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 795903 + ... + 795938.

Almost surely, 2^28653138 is an apocalyptic number.

28653138 is an abundant number, since it is smaller than the sum of its proper divisors (33428700).

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

28653138 is a wasteful number, since it uses less digits than its factorization.

28653138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591849 (or 1591846 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 28653138 is about 5352.8625986476. The cubic root of 28653138 is about 306.0018582484.

The spelling of 28653138 in words is "twenty-eight million, six hundred fifty-three thousand, one hundred thirty-eight".