1952399685 has 16 divisors (see below), whose sum is σ = 3224609280. Its totient is φ = 1007689920.

The previous prime is 1952399681. The next prime is 1952399707. The reversal of 1952399685 is 5869932591.

It is not a de Polignac number, because 1952399685 - 2² = 1952399681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1952399681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2098890 + ... + 2099819.

It is an arithmetic number, because the mean of its divisors is an integer number (201538080).

Almost surely, 2^1952399685 is an apocalyptic number.

1952399685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1952399685 is a deficient number, since it is larger than the sum of its proper divisors (1272209595).

1952399685 is a wasteful number, since it uses less digits than its factorization.

1952399685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4198748.

The product of its digits is 5248800, while the sum is 57.

The square root of 1952399685 is about 44185.9670596899. The cubic root of 1952399685 is about 1249.8452469753.

The spelling of 1952399685 in words is "one billion, nine hundred fifty-two million, three hundred ninety-nine thousand, six hundred eighty-five".