78193536 has 64 divisors (see below), whose sum is σ = 209185680. Its totient is φ = 25878528.

The previous prime is 78193529. The next prime is 78193559. The reversal of 78193536 is 63539187.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×78193536² = 12228458144366592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59640 + ... + 60936.

Almost surely, 2^78193536 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 78193536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104592840).

78193536 is an abundant number, since it is smaller than the sum of its proper divisors (130992144).

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

78193536 is a wasteful number, since it uses less digits than its factorization.

78193536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1459 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 78193536 is about 8842.7108965520. The cubic root of 78193536 is about 427.6189580377.

The spelling of 78193536 in words is "seventy-eight million, one hundred ninety-three thousand, five hundred thirty-six".