78223104 has 72 divisors (see below), whose sum is σ = 231339920. Its totient is φ = 26072064.

The previous prime is 78223097. The next prime is 78223127. The reversal of 78223104 is 40132287.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×78223104² = 12237707998789632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 12.

It is a congruent number.

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, 1254 + ... + 12570.

Almost surely, 2^78223104 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 78223104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115669960).

78223104 is an abundant number, since it is smaller than the sum of its proper divisors (153116816).

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

78223104 is a wasteful number, since it uses less digits than its factorization.

78223104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11342 (or 11322 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 78223104 is about 8844.3826240162. The cubic root of 78223104 is about 427.6728510005.

The spelling of 78223104 in words is "seventy-eight million, two hundred twenty-three thousand, one hundred four".