1694445140 has 12 divisors (see below), whose sum is σ = 3558334836. Its totient is φ = 677778048.

The previous prime is 1694445119. The next prime is 1694445157. The reversal of 1694445140 is 415444961.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 188073796 + 1506371344 = 13714^2 + 38812^2 .

It is a super-2 number, since 2×1694445140² = 5742288664939239200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1694445094 and 1694445103.

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, 42361109 + ... + 42361148.

It is an arithmetic number, because the mean of its divisors is an integer number (296527903).

Almost surely, 2^1694445140 is an apocalyptic number.

1694445140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1694445140 is an abundant number, since it is smaller than the sum of its proper divisors (1863889696).

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

1694445140 is a wasteful number, since it uses less digits than its factorization.

1694445140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84722266 (or 84722264 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1694445140 is about 41163.6385660937. The cubic root of 1694445140 is about 1192.1818456337.

The spelling of 1694445140 in words is "one billion, six hundred ninety-four million, four hundred forty-five thousand, one hundred forty".