1249887884 has 48 divisors (see below), whose sum is σ = 2633164800. Its totient is φ = 518369040.

The previous prime is 1249887871. The next prime is 1249887893. The reversal of 1249887884 is 4887889421.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27839 + ... + 57225.

It is an arithmetic number, because the mean of its divisors is an integer number (54857600).

Almost surely, 2^1249887884 is an apocalyptic number.

1249887884 is a gapful number since it is divisible by the number (14) 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 1249887884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1316582400).

1249887884 is an abundant number, since it is smaller than the sum of its proper divisors (1383276916).

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

1249887884 is a wasteful number, since it uses less digits than its factorization.

1249887884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29443 (or 29427 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 59.

The square root of 1249887884 is about 35353.7534640949. The cubic root of 1249887884 is about 1077.1851378397.

The spelling of 1249887884 in words is "one billion, two hundred forty-nine million, eight hundred eighty-seven thousand, eight hundred eighty-four".