78204000 has 384 divisors, whose sum is σ = 314496000. Its totient is φ = 16934400.

The previous prime is 78203963. The next prime is 78204001. The reversal of 78204000 is 40287.

It is a happy number.

It is a super-2 number, since 2×78204000² = 12231731232000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78204001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4115991 + ... + 4116009.

It is an arithmetic number, because the mean of its divisors is an integer number (819000).

Almost surely, 2^78204000 is an apocalyptic number.

78204000 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78204000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157248000).

78204000 is an abundant number, since it is smaller than the sum of its proper divisors (236292000).

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

78204000 is a wasteful number, since it uses less digits than its factorization.

78204000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 78204000 is about 8843.3025505181. The cubic root of 78204000 is about 427.6380321003.

Adding to 78204000 its reverse (40287), we get a palindrome (78244287).

The spelling of 78204000 in words is "seventy-eight million, two hundred four thousand".