1247089248 has 72 divisors (see below), whose sum is σ = 3552822000. Its totient is φ = 414945024.

The previous prime is 1247089237. The next prime is 1247089253. The reversal of 1247089248 is 8429807421.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168898 + ... + 176126.

It is an arithmetic number, because the mean of its divisors is an integer number (49344750).

Almost surely, 2^1247089248 is an apocalyptic number.

1247089248 is a gapful number since it is divisible by the number (18) 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 1247089248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1776411000).

1247089248 is an abundant number, since it is smaller than the sum of its proper divisors (2305732752).

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

1247089248 is a wasteful number, since it uses less digits than its factorization.

1247089248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7844 (or 7833 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 1247089248 is about 35314.1508180503. The cubic root of 1247089248 is about 1076.3805584876.

It can be divided in two parts, 124708 and 9248, that added together give a square (133956 = 366²).

The spelling of 1247089248 in words is "one billion, two hundred forty-seven million, eighty-nine thousand, two hundred forty-eight".