192991956 has 48 divisors (see below), whose sum is σ = 477804096. Its totient is φ = 60419584.

The previous prime is 192991943. The next prime is 192991979. The reversal of 192991956 is 659199291.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 192991899 and 192991908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161995 + ... + 163181.

It is an arithmetic number, because the mean of its divisors is an integer number (9954252).

Almost surely, 2^192991956 is an apocalyptic number.

It is an amenable number.

192991956 is an abundant number, since it is smaller than the sum of its proper divisors (284812140).

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

192991956 is a wasteful number, since it uses less digits than its factorization.

192991956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008 (or 2006 counting only the distinct ones).

The product of its digits is 393660, while the sum is 51.

The square root of 192991956 is about 13892.1544765382. The cubic root of 192991956 is about 577.8916276907.

The spelling of 192991956 in words is "one hundred ninety-two million, nine hundred ninety-one thousand, nine hundred fifty-six".