78139096 has 128 divisors (see below), whose sum is σ = 191692800. Its totient is φ = 29082240.

The previous prime is 78139091. The next prime is 78139097. The reversal of 78139096 is 69093187.

78139096 = T₆₄ + T₆₅ + ... + T₇₇₆.

It is a super-2 number, since 2×78139096² = 12211436647394432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78139091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 758581 + ... + 758683.

It is an arithmetic number, because the mean of its divisors is an integer number (1497600).

Almost surely, 2^78139096 is an apocalyptic number.

78139096 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78139096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95846400).

78139096 is an abundant number, since it is smaller than the sum of its proper divisors (113553704).

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

78139096 is a wasteful number, since it uses less digits than its factorization.

78139096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 78139096 is about 8839.6321190421. The cubic root of 78139096 is about 427.5196958654.

The spelling of 78139096 in words is "seventy-eight million, one hundred thirty-nine thousand, ninety-six".