1264623340 has 24 divisors (see below), whose sum is σ = 2666300112. Its totient is φ = 503832000.

The previous prime is 1264623307. The next prime is 1264623377. The reversal of 1264623340 is 433264621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120939 + ... + 130978.

It is an arithmetic number, because the mean of its divisors is an integer number (111095838).

Almost surely, 2^1264623340 is an apocalyptic number.

1264623340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264623340 is an abundant number, since it is smaller than the sum of its proper divisors (1401676772).

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

1264623340 is a wasteful number, since it uses less digits than its factorization.

1264623340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252177 (or 252175 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 1264623340 is about 35561.5429923956. The cubic root of 1264623340 is about 1081.4017406963.

Adding to 1264623340 its reverse (433264621), we get a palindrome (1697887961).

The spelling of 1264623340 in words is "one billion, two hundred sixty-four million, six hundred twenty-three thousand, three hundred forty".