1264993438 has 16 divisors (see below), whose sum is σ = 2039857920. Its totient is φ = 586457496.

The previous prime is 1264993423. The next prime is 1264993441. The reversal of 1264993438 is 8343994621.

It is a junction number, because it is equal to n+sod(n) for n = 1264993391 and 1264993400.

It is a congruent number.

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, 352356 + ... + 355927.

It is an arithmetic number, because the mean of its divisors is an integer number (127491120).

Almost surely, 2^1264993438 is an apocalyptic number.

1264993438 is a deficient number, since it is larger than the sum of its proper divisors (774864482).

1264993438 is a wasteful number, since it uses less digits than its factorization.

1264993438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708351.

The product of its digits is 1119744, while the sum is 49.

The square root of 1264993438 is about 35566.7462385864. The cubic root of 1264993438 is about 1081.5072228512.

The spelling of 1264993438 in words is "one billion, two hundred sixty-four million, nine hundred ninety-three thousand, four hundred thirty-eight".