1694972340 has 36 divisors (see below), whose sum is σ = 5141416644. Its totient is φ = 451992576.

The previous prime is 1694972339. The next prime is 1694972347. The reversal of 1694972340 is 432794961.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1053262116 + 641710224 = 32454^2 + 25332^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1694972347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4708077 + ... + 4708436.

It is an arithmetic number, because the mean of its divisors is an integer number (142817129).

Almost surely, 2^1694972340 is an apocalyptic number.

1694972340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1694972340 is an abundant number, since it is smaller than the sum of its proper divisors (3446444304).

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

1694972340 is a wasteful number, since it uses less digits than its factorization.

1694972340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9416528 (or 9416523 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 1694972340 is about 41170.0417779725. The cubic root of 1694972340 is about 1192.3054757001.

The spelling of 1694972340 in words is "one billion, six hundred ninety-four million, nine hundred seventy-two thousand, three hundred forty".