28302394 has 8 divisors (see below), whose sum is σ = 42588468. Its totient is φ = 14106240.

The previous prime is 28302389. The next prime is 28302403. The reversal of 28302394 is 49320382.

It can be written as a sum of positive squares in 2 ways, for example, as 27720225 + 582169 = 5265^2 + 763^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28302394² = 1602051012262472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21687 + ... + 22954.

Almost surely, 2^28302394 is an apocalyptic number.

28302394 is a deficient number, since it is larger than the sum of its proper divisors (14286074).

28302394 is a wasteful number, since it uses less digits than its factorization.

28302394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44960.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 28302394 is about 5319.9994360902. Note that the first 3 decimals coincide. The cubic root of 28302394 is about 304.7481357068.

The spelling of 28302394 in words is "twenty-eight million, three hundred two thousand, three hundred ninety-four".