78194560 has 64 divisors (see below), whose sum is σ = 197957520. Its totient is φ = 29433856.

The previous prime is 78194551. The next prime is 78194573. The reversal of 78194560 is 6549187.

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

It is a super-2 number, since 2×78194560² = 12228778427187200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 7287 + ... + 14473.

Almost surely, 2^78194560 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 78194560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98978760).

78194560 is an abundant number, since it is smaller than the sum of its proper divisors (119762960).

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

78194560 is a wasteful number, since it uses less digits than its factorization.

78194560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7223 (or 7211 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 78194560 is about 8842.7687971585. The cubic root of 78194560 is about 427.6208246878.

The spelling of 78194560 in words is "seventy-eight million, one hundred ninety-four thousand, five hundred sixty".