28394442 has 32 divisors (see below), whose sum is σ = 63452160. Its totient is φ = 9411840.

The previous prime is 28394441. The next prime is 28394447. The reversal of 28394442 is 24449382.

It is a junction number, because it is equal to n+sod(n) for n = 28394397 and 28394406.

It is not an unprimeable number, because it can be changed into a prime (28394441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8938 + ... + 11690.

It is an arithmetic number, because the mean of its divisors is an integer number (1982880).

Almost surely, 2^28394442 is an apocalyptic number.

28394442 is an abundant number, since it is smaller than the sum of its proper divisors (35057718).

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

28394442 is a wasteful number, since it uses less digits than its factorization.

28394442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2955 (or 2949 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 28394442 is about 5328.6435422160. The cubic root of 28394442 is about 305.0781560884.

The spelling of 28394442 in words is "twenty-eight million, three hundred ninety-four thousand, four hundred forty-two".