78238854 has 36 divisors (see below), whose sum is σ = 175200948. Its totient is φ = 25232760.

The previous prime is 78238843. The next prime is 78238873. The reversal of 78238854 is 45883287.

It is a super-2 number, since 2×78238854² = 12242636550466632, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15037 + ... + 19559.

It is an arithmetic number, because the mean of its divisors is an integer number (4866693).

Almost surely, 2^78238854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78238854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87600474).

78238854 is an abundant number, since it is smaller than the sum of its proper divisors (96962094).

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

78238854 is a wasteful number, since it uses less digits than its factorization.

78238854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4593 (or 4559 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 78238854 is about 8845.2729748719. The cubic root of 78238854 is about 427.7015526459.

The spelling of 78238854 in words is "seventy-eight million, two hundred thirty-eight thousand, eight hundred fifty-four".