78803172 has 72 divisors (see below), whose sum is σ = 237676320. Its totient is φ = 22513680.

The previous prime is 78803171. The next prime is 78803227. The reversal of 78803172 is 27130887.

It is a super-3 number, since 3×78803172³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (78803171) 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, 2154 + ... + 12737.

It is an arithmetic number, because the mean of its divisors is an integer number (3301060).

Almost surely, 2^78803172 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 78803172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118838160).

78803172 is an abundant number, since it is smaller than the sum of its proper divisors (158873148).

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

78803172 is a wasteful number, since it uses less digits than its factorization.

78803172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14918 (or 14903 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 78803172 is about 8877.1150719138. The cubic root of 78803172 is about 428.7273929493.

The spelling of 78803172 in words is "seventy-eight million, eight hundred three thousand, one hundred seventy-two".