28042406 has 24 divisors (see below), whose sum is σ = 49863600. Its totient is φ = 11789232.

The previous prime is 28042397. The next prime is 28042447. The reversal of 28042406 is 60424082.

It is a super-4 number, since 4×28042406⁴ (a number of 31 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2495 + ... + 7893.

It is an arithmetic number, because the mean of its divisors is an integer number (2077650).

Almost surely, 2^28042406 is an apocalyptic number.

28042406 is a deficient number, since it is larger than the sum of its proper divisors (21821194).

28042406 is a wasteful number, since it uses less digits than its factorization.

28042406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5468 (or 5461 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 28042406 is about 5295.5080964908. The cubic root of 28042406 is about 303.8121169964.

Adding to 28042406 its reverse (60424082), we get a palindrome (88466488).

It can be divided in two parts, 2 and 8042406, that added together give a palindrome (8042408).

The spelling of 28042406 in words is "twenty-eight million, forty-two thousand, four hundred six".