78084072 has 96 divisors (see below), whose sum is σ = 242892000. Its totient is φ = 22412160.

The previous prime is 78084067. The next prime is 78084073. The reversal of 78084072 is 27048087.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (78084073) 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, 12454 + ... + 17642.

It is an arithmetic number, because the mean of its divisors is an integer number (2530125).

Almost surely, 2^78084072 is an apocalyptic number.

78084072 is a gapful number since it is divisible by the number (72) 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 78084072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121446000).

78084072 is an abundant number, since it is smaller than the sum of its proper divisors (164807928).

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

78084072 is a wasteful number, since it uses less digits than its factorization.

78084072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5231 (or 5224 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 78084072 is about 8836.5192242195. The cubic root of 78084072 is about 427.4193220073.

The spelling of 78084072 in words is "seventy-eight million, eighty-four thousand, seventy-two".