78101838 has 48 divisors (see below), whose sum is σ = 174270096. Its totient is φ = 25269120.

The previous prime is 78101831. The next prime is 78101851. The reversal of 78101838 is 83810187.

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 (78101831) 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, 90706 + ... + 91562.

It is an arithmetic number, because the mean of its divisors is an integer number (3630627).

Almost surely, 2^78101838 is an apocalyptic number.

78101838 is an abundant number, since it is smaller than the sum of its proper divisors (96168258).

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

78101838 is a wasteful number, since it uses less digits than its factorization.

78101838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 78101838 is about 8837.5244271232. The cubic root of 78101838 is about 427.4517355997.

The spelling of 78101838 in words is "seventy-eight million, one hundred one thousand, eight hundred thirty-eight".