78211896 has 128 divisors (see below), whose sum is σ = 232243200. Its totient is φ = 21490560.

The previous prime is 78211873. The next prime is 78211897. The reversal of 78211896 is 69811287.

It is a super-2 number, since 2×78211896² = 12234201351829632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78211897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 942271 + ... + 942353.

It is an arithmetic number, because the mean of its divisors is an integer number (1814400).

Almost surely, 2^78211896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78211896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116121600).

78211896 is an abundant number, since it is smaller than the sum of its proper divisors (154031304).

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

78211896 is a wasteful number, since it uses less digits than its factorization.

78211896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 245 counting only the distinct ones).

The product of its digits is 48384, while the sum is 42.

The square root of 78211896 is about 8843.7489787985. The cubic root of 78211896 is about 427.6524240166.

The spelling of 78211896 in words is "seventy-eight million, two hundred eleven thousand, eight hundred ninety-six".