102120444 has 36 divisors (see below), whose sum is σ = 265117944. Its totient is φ = 33119712.

The previous prime is 102120443. The next prime is 102120449. The reversal of 102120444 is 444021201.

102120444 is a `hidden beast` number, since 10 + 212 + 0 + 444 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37002 + ... + 39665.

Almost surely, 2^102120444 is an apocalyptic number.

It is an amenable number.

102120444 is an abundant number, since it is smaller than the sum of its proper divisors (162997500).

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

102120444 is a wasteful number, since it uses less digits than its factorization.

102120444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76714 (or 76709 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 102120444 is about 10105.4660456606. The cubic root of 102120444 is about 467.4167070192.

Adding to 102120444 its reverse (444021201), we get a palindrome (546141645).

The spelling of 102120444 in words is "one hundred two million, one hundred twenty thousand, four hundred forty-four".