1264648340 has 48 divisors (see below), whose sum is σ = 2704608144. Its totient is φ = 496588800.

The previous prime is 1264648291. The next prime is 1264648349. The reversal of 1264648340 is 438464621.

It can be written as a sum of positive squares in 8 ways, for example, as 988036 + 1263660304 = 994^2 + 35548^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1264648294 and 1264648303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264648349) 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, 1191410 + ... + 1192470.

It is an arithmetic number, because the mean of its divisors is an integer number (56346003).

Almost surely, 2^1264648340 is an apocalyptic number.

1264648340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264648340 is an abundant number, since it is smaller than the sum of its proper divisors (1439959804).

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

1264648340 is a wasteful number, since it uses less digits than its factorization.

1264648340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108 (or 2106 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 1264648340 is about 35561.8944939664. The cubic root of 1264648340 is about 1081.4088666297.

The spelling of 1264648340 in words is "one billion, two hundred sixty-four million, six hundred forty-eight thousand, three hundred forty".