78204344 has 8 divisors (see below), whose sum is σ = 146633160. Its totient is φ = 39102168.

The previous prime is 78204331. The next prime is 78204349. The reversal of 78204344 is 44340287.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×78204344² = 12231838840940672, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78204344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78204349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4887764 + ... + 4887779.

It is an arithmetic number, because the mean of its divisors is an integer number (18329145).

Almost surely, 2^78204344 is an apocalyptic number.

It is an amenable number.

78204344 is a deficient number, since it is larger than the sum of its proper divisors (68428816).

78204344 is a wasteful number, since it uses less digits than its factorization.

78204344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9775549 (or 9775545 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 78204344 is about 8843.3220002440. The cubic root of 78204344 is about 427.6386591239.

The spelling of 78204344 in words is "seventy-eight million, two hundred four thousand, three hundred forty-four".