1249985688 has 48 divisors (see below), whose sum is σ = 3635165880. Its totient is φ = 357138432.

The previous prime is 1249985657. The next prime is 1249985767. The reversal of 1249985688 is 8865899421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 530281 + ... + 532632.

Almost surely, 2^1249985688 is an apocalyptic number.

It is an amenable number.

1249985688 is an abundant number, since it is smaller than the sum of its proper divisors (2385180192).

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

1249985688 is a wasteful number, since it uses less digits than its factorization.

1249985688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062936 (or 1062925 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 60.

The square root of 1249985688 is about 35355.1366565030. The cubic root of 1249985688 is about 1077.2132337643.

The spelling of 1249985688 in words is "one billion, two hundred forty-nine million, nine hundred eighty-five thousand, six hundred eighty-eight".