28401652 has 12 divisors (see below), whose sum is σ = 50168160. Its totient is φ = 14067896.

The previous prime is 28401649. The next prime is 28401683. The reversal of 28401652 is 25610482.

It is a self number, because there is not a number n which added to its sum of digits gives 28401652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32752 + ... + 33607.

It is an arithmetic number, because the mean of its divisors is an integer number (4180680).

Almost surely, 2^28401652 is an apocalyptic number.

It is an amenable number.

28401652 is a deficient number, since it is larger than the sum of its proper divisors (21766508).

28401652 is a wasteful number, since it uses less digits than its factorization.

28401652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66470 (or 66468 counting only the distinct ones).

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

The square root of 28401652 is about 5329.3200316738. The cubic root of 28401652 is about 305.1039760165.

The spelling of 28401652 in words is "twenty-eight million, four hundred one thousand, six hundred fifty-two".