28042516 has 12 divisors (see below), whose sum is σ = 49155232. Its totient is φ = 13998168.

The previous prime is 28042501. The next prime is 28042517. The reversal of 28042516 is 61524082.

It is a super-2 number, since 2×28042516² = 1572765407220512, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28042517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2880 + ... + 8023.

Almost surely, 2^28042516 is an apocalyptic number.

It is an amenable number.

28042516 is a deficient number, since it is larger than the sum of its proper divisors (21112716).

28042516 is a wasteful number, since it uses less digits than its factorization.

28042516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11550 (or 11548 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28042516 is about 5295.5184826417. The cubic root of 28042516 is about 303.8125142434.

Adding to 28042516 its reverse (61524082), we get a palindrome (89566598).

The spelling of 28042516 in words is "twenty-eight million, forty-two thousand, five hundred sixteen".