1248631340 has 48 divisors (see below), whose sum is σ = 2896750080. Its totient is φ = 448294080.

The previous prime is 1248631339. The next prime is 1248631357. The reversal of 1248631340 is 431368421.

It is a junction number, because it is equal to n+sod(n) for n = 1248631297 and 1248631306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18542 + ... + 53301.

It is an arithmetic number, because the mean of its divisors is an integer number (60348960).

Almost surely, 2^1248631340 is an apocalyptic number.

1248631340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1248631340 is an abundant number, since it is smaller than the sum of its proper divisors (1648118740).

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

1248631340 is a wasteful number, since it uses less digits than its factorization.

1248631340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71942 (or 71940 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 1248631340 is about 35335.9779827869. The cubic root of 1248631340 is about 1076.8240429575.

Adding to 1248631340 its reverse (431368421), we get a palindrome (1679999761).

The spelling of 1248631340 in words is "one billion, two hundred forty-eight million, six hundred thirty-one thousand, three hundred forty".