28401102 has 12 divisors (see below), whose sum is σ = 61535760. Its totient is φ = 9467028.

The previous prime is 28401097. The next prime is 28401103. The reversal of 28401102 is 20110482.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1577839 = 28401102 / (2 + 8 + 4 + 0 + 1 + 1 + 0 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28401103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 788902 + ... + 788937.

It is an arithmetic number, because the mean of its divisors is an integer number (5127980).

Almost surely, 2^28401102 is an apocalyptic number.

28401102 is an abundant number, since it is smaller than the sum of its proper divisors (33134658).

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

28401102 is a wasteful number, since it uses less digits than its factorization.

28401102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577847 (or 1577844 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 28401102 is about 5329.2684300943. The cubic root of 28401102 is about 305.1020065504.

Adding to 28401102 its reverse (20110482), we get a palindrome (48511584).

The spelling of 28401102 in words is "twenty-eight million, four hundred one thousand, one hundred two".