1892471994 has 72 divisors (see below), whose sum is σ = 4978086048. Its totient is φ = 508890240.

The previous prime is 1892471989. The next prime is 1892472013. The reversal of 1892471994 is 4991742981.

1892471994 is a `hidden beast` number, since 1 + 89 + 2 + 471 + 9 + 94 = 666.

It is a super-3 number, since 3×1892471994³ (a number of 29 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1892471994.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10429 + ... + 62399.

It is an arithmetic number, because the mean of its divisors is an integer number (69140084).

Almost surely, 2^1892471994 is an apocalyptic number.

1892471994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1892471994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2489043024).

1892471994 is an abundant number, since it is smaller than the sum of its proper divisors (3085614054).

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

1892471994 is a wasteful number, since it uses less digits than its factorization.

1892471994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52020 (or 52000 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 1892471994 is about 43502.5515803384. The cubic root of 1892471994 is about 1236.9243917472.

The spelling of 1892471994 in words is "one billion, eight hundred ninety-two million, four hundred seventy-one thousand, nine hundred ninety-four".