78634080 has 288 divisors, whose sum is σ = 318427200. Its totient is φ = 17289216.

The previous prime is 78634007. The next prime is 78634091. The reversal of 78634080 is 8043687.

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

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 292186 + ... + 292454.

It is an arithmetic number, because the mean of its divisors is an integer number (1105650).

Almost surely, 2^78634080 is an apocalyptic number.

78634080 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 78634080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159213600).

78634080 is an abundant number, since it is smaller than the sum of its proper divisors (239793120).

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

78634080 is a wasteful number, since it uses less digits than its factorization.

78634080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 78634080 is about 8867.5859172607. The cubic root of 78634080 is about 428.4205259201.

The spelling of 78634080 in words is "seventy-eight million, six hundred thirty-four thousand, eighty".