28642104 has 24 divisors (see below), whose sum is σ = 77572560. Its totient is φ = 9547344.

The previous prime is 28642099. The next prime is 28642151. The reversal of 28642104 is 40124682.

28642104 is a `hidden beast` number, since 2 + 8 + 642 + 10 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198832 + ... + 198975.

It is an arithmetic number, because the mean of its divisors is an integer number (3232190).

Almost surely, 2^28642104 is an apocalyptic number.

28642104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28642104 is an abundant number, since it is smaller than the sum of its proper divisors (48930456).

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

28642104 is a wasteful number, since it uses less digits than its factorization.

28642104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397819 (or 397812 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28642104 is about 5351.8318359231. The cubic root of 28642104 is about 305.9625739181.

Adding to 28642104 its reverse (40124682), we get a palindrome (68766786).

The spelling of 28642104 in words is "twenty-eight million, six hundred forty-two thousand, one hundred four".