28361644 has 24 divisors (see below), whose sum is σ = 53031888. Its totient is φ = 13224960.

The previous prime is 28361629. The next prime is 28361651. The reversal of 28361644 is 44616382.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5839 + ... + 9529.

It is an arithmetic number, because the mean of its divisors is an integer number (2209662).

Almost surely, 2^28361644 is an apocalyptic number.

It is an amenable number.

28361644 is a deficient number, since it is larger than the sum of its proper divisors (24670244).

28361644 is a wasteful number, since it uses less digits than its factorization.

28361644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825 (or 3823 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 28361644 is about 5325.5651343308. The cubic root of 28361644 is about 304.9606470771.

The spelling of 28361644 in words is "twenty-eight million, three hundred sixty-one thousand, six hundred forty-four".