78949838 has 24 divisors (see below), whose sum is σ = 130712400. Its totient is φ = 35736800.

The previous prime is 78949837. The next prime is 78949859. The reversal of 78949838 is 83894987.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78949837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74738 + ... + 75786.

It is an arithmetic number, because the mean of its divisors is an integer number (5446350).

Almost surely, 2^78949838 is an apocalyptic number.

78949838 is a deficient number, since it is larger than the sum of its proper divisors (51762562).

78949838 is a wasteful number, since it uses less digits than its factorization.

78949838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384 (or 1373 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 56.

The square root of 78949838 is about 8885.3721362698. The cubic root of 78949838 is about 428.9932061164.

The spelling of 78949838 in words is "seventy-eight million, nine hundred forty-nine thousand, eight hundred thirty-eight".