28402232 has 8 divisors (see below), whose sum is σ = 53254200. Its totient is φ = 14201112.

The previous prime is 28402229. The next prime is 28402237. The reversal of 28402232 is 23220482.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 28402198 and 28402207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28402237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1775132 + ... + 1775147.

It is an arithmetic number, because the mean of its divisors is an integer number (6656775).

Almost surely, 2^28402232 is an apocalyptic number.

It is an amenable number.

28402232 is a deficient number, since it is larger than the sum of its proper divisors (24851968).

28402232 is a wasteful number, since it uses less digits than its factorization.

28402232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550285 (or 3550281 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 28402232 is about 5329.3744473437. The cubic root of 28402232 is about 305.1060528804.

The spelling of 28402232 in words is "twenty-eight million, four hundred two thousand, two hundred thirty-two".