78078336 has 128 divisors (see below), whose sum is σ = 244930560. Its totient is φ = 21565440.

The previous prime is 78078323. The next prime is 78078359. The reversal of 78078336 is 63387087.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82860 + ... + 83796.

It is an arithmetic number, because the mean of its divisors is an integer number (1913520).

Almost surely, 2^78078336 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 78078336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122465280).

78078336 is an abundant number, since it is smaller than the sum of its proper divisors (166852224).

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

78078336 is a wasteful number, since it uses less digits than its factorization.

78078336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992 (or 980 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 78078336 is about 8836.1946560723. The cubic root of 78078336 is about 427.4088557786.

The spelling of 78078336 in words is "seventy-eight million, seventy-eight thousand, three hundred thirty-six".