78278888 has 32 divisors (see below), whose sum is σ = 153792000. Its totient is φ = 37302720.

The previous prime is 78278887. The next prime is 78278891. The reversal of 78278888 is 88887287.

It is a super-2 number, since 2×78278888² = 12255168613033088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78278887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16193 + ... + 20463.

It is an arithmetic number, because the mean of its divisors is an integer number (4806000).

Almost surely, 2^78278888 is an apocalyptic number.

It is an amenable number.

78278888 is a deficient number, since it is larger than the sum of its proper divisors (75513112).

78278888 is a wasteful number, since it uses less digits than its factorization.

78278888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385 (or 4381 counting only the distinct ones).

The product of its digits is 3211264, while the sum is 56.

The square root of 78278888 is about 8847.5357021037. The cubic root of 78278888 is about 427.7744903379.

The spelling of 78278888 in words is "seventy-eight million, two hundred seventy-eight thousand, eight hundred eighty-eight".