1686949272 has 24 divisors (see below), whose sum is σ = 4568821140. Its totient is φ = 562316400.

The previous prime is 1686949261. The next prime is 1686949367. The reversal of 1686949272 is 2729496861.

1686949272 is a `hidden beast` number, since 1 + 6 + 86 + 9 + 492 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11714854 + ... + 11714997.

Almost surely, 2^1686949272 is an apocalyptic number.

1686949272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1686949272 is an abundant number, since it is smaller than the sum of its proper divisors (2881871868).

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

1686949272 is a wasteful number, since it uses less digits than its factorization.

1686949272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23429863 (or 23429856 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 1686949272 is about 41072.4880181369. The cubic root of 1686949272 is about 1190.4212598906.

The spelling of 1686949272 in words is "one billion, six hundred eighty-six million, nine hundred forty-nine thousand, two hundred seventy-two".