78122004 has 48 divisors (see below), whose sum is σ = 193814208. Its totient is φ = 24406528.

The previous prime is 78122003. The next prime is 78122017. The reversal of 78122004 is 40022187.

It is a super-2 number, since 2×78122004² = 12206095017952032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78122003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59119 + ... + 60425.

It is an arithmetic number, because the mean of its divisors is an integer number (4037796).

Almost surely, 2^78122004 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 78122004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96907104).

78122004 is an abundant number, since it is smaller than the sum of its proper divisors (115692204).

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

78122004 is a wasteful number, since it uses less digits than its factorization.

78122004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624 (or 1622 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 78122004 is about 8838.6652838537. The cubic root of 78122004 is about 427.4885219722.

The spelling of 78122004 in words is "seventy-eight million, one hundred twenty-two thousand, four".