78104100 has 72 divisors (see below), whose sum is σ = 227728480. Its totient is φ = 20666880.

The previous prime is 78104093. The next prime is 78104101. The reversal of 78104100 is 140187.

It is a super-2 number, since 2×78104100² = 12200500873620000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78104101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40764 + ... + 42636.

Almost surely, 2^78104100 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 78104100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113864240).

78104100 is an abundant number, since it is smaller than the sum of its proper divisors (149624380).

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

78104100 is a wasteful number, since it uses less digits than its factorization.

78104100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029 (or 2022 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 78104100 is about 8837.6524032121. The cubic root of 78104100 is about 427.4558622055.

Adding to 78104100 its reverse (140187), we get a palindrome (78244287).

The spelling of 78104100 in words is "seventy-eight million, one hundred four thousand, one hundred".