44278164 has 90 divisors (see below), whose sum is σ = 134698410. Its totient is φ = 12646368.

The previous prime is 44278163. The next prime is 44278187. The reversal of 44278164 is 46187244.

It can be written as a sum of positive squares in only one way, i.e., 39690000 + 4588164 = 6300^2 + 2142^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44278163) 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 in 29 ways as a sum of consecutive naturals, for example, 14482 + ... + 17270.

It is an arithmetic number, because the mean of its divisors is an integer number (1496649).

Almost surely, 2^44278164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44278164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67349205).

44278164 is an abundant number, since it is smaller than the sum of its proper divisors (90420246).

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

44278164 is a wasteful number, since it uses less digits than its factorization.

44278164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819 (or 2801 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 44278164 is about 6654.1839469615. The cubic root of 44278164 is about 353.7772226592. Note that the first 3 decimals are identical.

It can be divided in two parts, 442 and 78164, that added together give a triangular number (78606 = T₃₉₆).

The spelling of 44278164 in words is "forty-four million, two hundred seventy-eight thousand, one hundred sixty-four".