192978396 has 144 divisors (see below), whose sum is σ = 552367200. Its totient is φ = 58226688.

The previous prime is 192978391. The next prime is 192978397. The reversal of 192978396 is 693879291.

192978396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×192978396² = 74481322645465632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (1469664) is a multiple of the sum of its prime divisors (224).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (192978391) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1770390 + ... + 1770498.

Almost surely, 2^192978396 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 192978396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276183600).

192978396 is an abundant number, since it is smaller than the sum of its proper divisors (359388804).

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

192978396 is a wasteful number, since it uses less digits than its factorization.

192978396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 224 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 192978396 is about 13891.6664227155. Note that the first 3 decimals coincide. The cubic root of 192978396 is about 577.8780927673.

The spelling of 192978396 in words is "one hundred ninety-two million, nine hundred seventy-eight thousand, three hundred ninety-six".