78341388 has 48 divisors (see below), whose sum is σ = 186041856. Its totient is φ = 25655040.

The previous prime is 78341387. The next prime is 78341407. The reversal of 78341388 is 88314387.

It is a super-2 number, since 2×78341388² = 12274746147533088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78341387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297745 + ... + 298007.

It is an arithmetic number, because the mean of its divisors is an integer number (3875872).

Almost surely, 2^78341388 is an apocalyptic number.

It is an amenable number.

78341388 is an abundant number, since it is smaller than the sum of its proper divisors (107700468).

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

78341388 is a wasteful number, since it uses less digits than its factorization.

78341388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614 (or 612 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 78341388 is about 8851.0670543161. The cubic root of 78341388 is about 427.8883089929. Note that the first 3 decimals are identical.

The spelling of 78341388 in words is "seventy-eight million, three hundred forty-one thousand, three hundred eighty-eight".