1705381940 has 12 divisors (see below), whose sum is σ = 3581302116. Its totient is φ = 682152768.

The previous prime is 1705381933. The next prime is 1705381967. The reversal of 1705381940 is 491835071.

It can be written as a sum of positive squares in 2 ways, for example, as 540934564 + 1164447376 = 23258^2 + 34124^2 .

It is a super-2 number, since 2×1705381940² = 5816655122556327200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1705381894 and 1705381903.

It is a congruent number.

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, 42634529 + ... + 42634568.

It is an arithmetic number, because the mean of its divisors is an integer number (298441843).

Almost surely, 2^1705381940 is an apocalyptic number.

1705381940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1705381940 is an abundant number, since it is smaller than the sum of its proper divisors (1875920176).

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

1705381940 is a wasteful number, since it uses less digits than its factorization.

1705381940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85269106 (or 85269104 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1705381940 is about 41296.2702916377. The cubic root of 1705381940 is about 1194.7413269232.

The spelling of 1705381940 in words is "one billion, seven hundred five million, three hundred eighty-one thousand, nine hundred forty".