28383438 has 16 divisors (see below), whose sum is σ = 60106320. Its totient is φ = 8904576.

The previous prime is 28383437. The next prime is 28383463. The reversal of 28383438 is 83438382.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28383396 and 28383405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28383437) 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, 139033 + ... + 139236.

It is an arithmetic number, because the mean of its divisors is an integer number (3756645).

Almost surely, 2^28383438 is an apocalyptic number.

28383438 is an abundant number, since it is smaller than the sum of its proper divisors (31722882).

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

28383438 is a wasteful number, since it uses less digits than its factorization.

28383438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278291.

The product of its digits is 110592, while the sum is 39.

The square root of 28383438 is about 5327.6109092163. The cubic root of 28383438 is about 305.0387409358.

The spelling of 28383438 in words is "twenty-eight million, three hundred eighty-three thousand, four hundred thirty-eight".