102805444 has 24 divisors (see below), whose sum is σ = 208510848. Its totient is φ = 43438080.

The previous prime is 102805429. The next prime is 102805457. The reversal of 102805444 is 444508201.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 23869 + ... + 27844.

It is an arithmetic number, because the mean of its divisors is an integer number (8687952).

Almost surely, 2^102805444 is an apocalyptic number.

102805444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

102805444 is an abundant number, since it is smaller than the sum of its proper divisors (105705404).

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

102805444 is a wasteful number, since it uses less digits than its factorization.

102805444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51795 (or 51793 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 102805444 is about 10139.3019483592. The cubic root of 102805444 is about 468.4594861445.

The spelling of 102805444 in words is "one hundred two million, eight hundred five thousand, four hundred forty-four".