28515942 has 96 divisors (see below), whose sum is σ = 79480800. Its totient is φ = 7511616.

The previous prime is 28515913. The next prime is 28515983. The reversal of 28515942 is 24951582.

It is a junction number, because it is equal to n+sod(n) for n = 28515897 and 28515906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33984 + ... + 34812.

It is an arithmetic number, because the mean of its divisors is an integer number (827925).

Almost surely, 2^28515942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28515942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39740400).

28515942 is an abundant number, since it is smaller than the sum of its proper divisors (50964858).

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

28515942 is a wasteful number, since it uses less digits than its factorization.

28515942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 854 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 28515942 is about 5340.0320223759. The cubic root of 28515942 is about 305.5126806961.

The spelling of 28515942 in words is "twenty-eight million, five hundred fifteen thousand, nine hundred forty-two".