78455776 has 24 divisors (see below), whose sum is σ = 176526000. Its totient is φ = 33623808.

The previous prime is 78455771. The next prime is 78455777. The reversal of 78455776 is 67755487.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78455771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174901 + ... + 175348.

It is an arithmetic number, because the mean of its divisors is an integer number (7355250).

Almost surely, 2^78455776 is an apocalyptic number.

It is an amenable number.

78455776 is an abundant number, since it is smaller than the sum of its proper divisors (98070224).

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

78455776 is a wasteful number, since it uses less digits than its factorization.

78455776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350266 (or 350258 counting only the distinct ones).

The product of its digits is 1646400, while the sum is 49.

The square root of 78455776 is about 8857.5265170362. The cubic root of 78455776 is about 428.0964641218.

The spelling of 78455776 in words is "seventy-eight million, four hundred fifty-five thousand, seven hundred seventy-six".