1138277248 has 64 divisors (see below), whose sum is σ = 2310973200. Its totient is φ = 558379008.

The previous prime is 1138277233. The next prime is 1138277303. The reversal of 1138277248 is 8427728311.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856590 + ... + 1857202.

Almost surely, 2^1138277248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1138277248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1155486600).

1138277248 is an abundant number, since it is smaller than the sum of its proper divisors (1172695952).

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

1138277248 is an equidigital number, since it uses as much as digits as its factorization.

1138277248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879 (or 867 counting only the distinct ones).

The product of its digits is 150528, while the sum is 43.

The square root of 1138277248 is about 33738.3646313807. The cubic root of 1138277248 is about 1044.1174444488.

The spelling of 1138277248 in words is "one billion, one hundred thirty-eight million, two hundred seventy-seven thousand, two hundred forty-eight".