1992891894 has 16 divisors (see below), whose sum is σ = 4555181568. Its totient is φ = 569397672.

The previous prime is 1992891881. The next prime is 1992891907. The reversal of 1992891894 is 4981982991.

It is an interprime number because it is at equal distance from previous prime (1992891881) and next prime (1992891907).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23724862 + ... + 23724945.

It is an arithmetic number, because the mean of its divisors is an integer number (284698848).

Almost surely, 2^1992891894 is an apocalyptic number.

1992891894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1992891894 is an abundant number, since it is smaller than the sum of its proper divisors (2562289674).

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

1992891894 is a wasteful number, since it uses less digits than its factorization.

1992891894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47449819.

The product of its digits is 3359232, while the sum is 60.

The square root of 1992891894 is about 44641.8177721293. The cubic root of 1992891894 is about 1258.4266693960.

The spelling of 1992891894 in words is "one billion, nine hundred ninety-two million, eight hundred ninety-one thousand, eight hundred ninety-four".