1248661380 has 96 divisors (see below), whose sum is σ = 3732341760. Its totient is φ = 310988160.

The previous prime is 1248661343. The next prime is 1248661411. The reversal of 1248661380 is 831668421.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73227 + ... + 88653.

It is an arithmetic number, because the mean of its divisors is an integer number (38878560).

Almost surely, 2^1248661380 is an apocalyptic number.

1248661380 is a gapful number since it is divisible by the number (10) 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 1248661380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1866170880).

1248661380 is an abundant number, since it is smaller than the sum of its proper divisors (2483680380).

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

1248661380 is a wasteful number, since it uses less digits than its factorization.

1248661380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15529 (or 15527 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 1248661380 is about 35336.4030427546. The cubic root of 1248661380 is about 1076.8326784220.

The spelling of 1248661380 in words is "one billion, two hundred forty-eight million, six hundred sixty-one thousand, three hundred eighty".