1264238838 has 48 divisors (see below), whose sum is σ = 2950511616. Its totient is φ = 390083760.

The previous prime is 1264238831. The next prime is 1264238849. The reversal of 1264238838 is 8388324621.

1264238838 is a `hidden beast` number, since 1 + 264 + 2 + 388 + 3 + 8 = 666.

1264238838 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1264238793 and 1264238802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264238831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36420 + ... + 62087.

It is an arithmetic number, because the mean of its divisors is an integer number (61468992).

Almost surely, 2^1264238838 is an apocalyptic number.

1264238838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1264238838 is an abundant number, since it is smaller than the sum of its proper divisors (1686272778).

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

1264238838 is a wasteful number, since it uses less digits than its factorization.

1264238838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98569 (or 98566 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 1264238838 is about 35556.1364324078. The cubic root of 1264238838 is about 1081.2921314377.

The spelling of 1264238838 in words is "one billion, two hundred sixty-four million, two hundred thirty-eight thousand, eight hundred thirty-eight".