78881895 has 24 divisors (see below), whose sum is σ = 138465600. Its totient is φ = 41535936.

The previous prime is 78881893. The next prime is 78881897. The reversal of 78881895 is 59818887.

It is an interprime number because it is at equal distance from previous prime (78881893) and next prime (78881897).

It is not a de Polignac number, because 78881895 - 2¹ = 78881893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78881893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7540 + ... + 14649.

It is an arithmetic number, because the mean of its divisors is an integer number (5769400).

Almost surely, 2^78881895 is an apocalyptic number.

78881895 is a deficient number, since it is larger than the sum of its proper divisors (59583705).

78881895 is a wasteful number, since it uses less digits than its factorization.

78881895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22279 (or 22276 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 54.

The square root of 78881895 is about 8881.5480069637. The cubic root of 78881895 is about 428.8701091757.

The spelling of 78881895 in words is "seventy-eight million, eight hundred eighty-one thousand, eight hundred ninety-five".