1891741952 has 36 divisors (see below), whose sum is σ = 3788318940. Its totient is φ = 942809088.

The previous prime is 1891741933. The next prime is 1891741987. The reversal of 1891741952 is 2591471981.

It can be written as a sum of positive squares in 2 ways, for example, as 106172416 + 1785569536 = 10304^2 + 42256^2 .

It is a super-2 number, since 2×1891741952² = 7157375225913540608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1891741897 and 1891741906.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68324 + ... + 91932.

Almost surely, 2^1891741952 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 1891741952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1894159470).

1891741952 is an abundant number, since it is smaller than the sum of its proper divisors (1896576988).

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

1891741952 is an equidigital number, since it uses as much as digits as its factorization.

1891741952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23938 (or 23924 counting only the distinct ones).

The product of its digits is 181440, while the sum is 47.

The square root of 1891741952 is about 43494.1599757945. The cubic root of 1891741952 is about 1236.7653188697.

The spelling of 1891741952 in words is "one billion, eight hundred ninety-one million, seven hundred forty-one thousand, nine hundred fifty-two".