1264644234 has 72 divisors (see below), whose sum is σ = 3204534528. Its totient is φ = 359387280.

The previous prime is 1264644203. The next prime is 1264644257. The reversal of 1264644234 is 4324464621.

1264644234 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 644 + 2 + 3 + 4 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 164709 + ... + 172215.

It is an arithmetic number, because the mean of its divisors is an integer number (44507424).

Almost surely, 2^1264644234 is an apocalyptic number.

1264644234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1264644234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1602267264).

1264644234 is an abundant number, since it is smaller than the sum of its proper divisors (1939890294).

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

1264644234 is a wasteful number, since it uses less digits than its factorization.

1264644234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7720 (or 7710 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

The square root of 1264644234 is about 35561.8367635869. The cubic root of 1264644234 is about 1081.4076962729.

The spelling of 1264644234 in words is "one billion, two hundred sixty-four million, six hundred forty-four thousand, two hundred thirty-four".