28350438 has 16 divisors (see below), whose sum is σ = 56768256. Its totient is φ = 9438920.

The previous prime is 28350433. The next prime is 28350521. The reversal of 28350438 is 83405382.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28350399 and 28350408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28350431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3895 + ... + 8477.

It is an arithmetic number, because the mean of its divisors is an integer number (3548016).

Almost surely, 2^28350438 is an apocalyptic number.

28350438 is an abundant number, since it is smaller than the sum of its proper divisors (28417818).

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

28350438 is a wasteful number, since it uses less digits than its factorization.

28350438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5619.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 28350438 is about 5324.5129354712. The cubic root of 28350438 is about 304.9204773419.

It can be divided in two parts, 283 and 50438, that added together give a triangular number (50721 = T₃₁₈).

The spelling of 28350438 in words is "twenty-eight million, three hundred fifty thousand, four hundred thirty-eight".