78189696 has 192 divisors, whose sum is σ = 253955520. Its totient is φ = 22910976.

The previous prime is 78189689. The next prime is 78189703. The reversal of 78189696 is 69698187.

It is an interprime number because it is at equal distance from previous prime (78189689) and next prime (78189703).

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×78189696² = 12227257121144832, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a zygodrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 344335 + ... + 344561.

It is an arithmetic number, because the mean of its divisors is an integer number (1322685).

Almost surely, 2^78189696 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 78189696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126977760).

78189696 is an abundant number, since it is smaller than the sum of its proper divisors (175765824).

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

78189696 is a wasteful number, since it uses less digits than its factorization.

78189696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 268 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 78189696 is about 8842.4937659011. The cubic root of 78189696 is about 427.6119579549.

The spelling of 78189696 in words is "seventy-eight million, one hundred eighty-nine thousand, six hundred ninety-six".