78238080 has 288 divisors, whose sum is σ = 293099040. Its totient is φ = 19218432.

The previous prime is 78238073. The next prime is 78238081. The reversal of 78238080 is 8083287.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×78238080² = 12242394324172800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78238081) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1664617 + ... + 1664663.

It is an arithmetic number, because the mean of its divisors is an integer number (1017705).

Almost surely, 2^78238080 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 78238080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146549520).

78238080 is an abundant number, since it is smaller than the sum of its proper divisors (214860960).

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

78238080 is a wasteful number, since it uses less digits than its factorization.

78238080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 74 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 78238080 is about 8845.2292225810. The cubic root of 78238080 is about 427.7001422550.

The spelling of 78238080 in words is "seventy-eight million, two hundred thirty-eight thousand, eighty".