1246739680 has 96 divisors (see below), whose sum is σ = 3000564000. Its totient is φ = 489449472.

The previous prime is 1246739677. The next prime is 1246739687. The reversal of 1246739680 is 869376421.

It is a self number, because there is not a number n which added to its sum of digits gives 1246739680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1246739687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3572146 + ... + 3572494.

It is an arithmetic number, because the mean of its divisors is an integer number (31255875).

Almost surely, 2^1246739680 is an apocalyptic number.

1246739680 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 1246739680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500282000).

1246739680 is an abundant number, since it is smaller than the sum of its proper divisors (1753824320).

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

1246739680 is a wasteful number, since it uses less digits than its factorization.

1246739680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 1246739680 is about 35309.2010671440. The cubic root of 1246739680 is about 1076.2799767096.

The spelling of 1246739680 in words is "one billion, two hundred forty-six million, seven hundred thirty-nine thousand, six hundred eighty".