1399685952 has 112 divisors (see below), whose sum is σ = 4273897472. Its totient is φ = 395988480.

The previous prime is 1399685941. The next prime is 1399685971. The reversal of 1399685952 is 2595869931.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×1399685952² = 3918241528452292608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1399685892 and 1399685901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133377 + ... + 143487.

Almost surely, 2^1399685952 is an apocalyptic number.

1399685952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399685952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2136948736).

1399685952 is an abundant number, since it is smaller than the sum of its proper divisors (2874211520).

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

1399685952 is a wasteful number, since it uses less digits than its factorization.

1399685952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10236 (or 10226 counting only the distinct ones).

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

The square root of 1399685952 is about 37412.3769894403. The cubic root of 1399685952 is about 1118.6052877248.

The spelling of 1399685952 in words is "one billion, three hundred ninety-nine million, six hundred eighty-five thousand, nine hundred fifty-two".