28350639 has 12 divisors (see below), whose sum is σ = 41950272. Its totient is φ = 18439200.

The previous prime is 28350629. The next prime is 28350667. The reversal of 28350639 is 93605382.

It is not a de Polignac number, because 28350639 - 2⁵ = 28350607 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28350629) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 38047 + ... + 38784.

It is an arithmetic number, because the mean of its divisors is an integer number (3495856).

Almost surely, 2^28350639 is an apocalyptic number.

28350639 is a deficient number, since it is larger than the sum of its proper divisors (13599633).

28350639 is a wasteful number, since it uses less digits than its factorization.

28350639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76878 (or 76875 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 28350639 is about 5324.5318104036. The cubic root of 28350639 is about 304.9211979524.

The spelling of 28350639 in words is "twenty-eight million, three hundred fifty thousand, six hundred thirty-nine".