1264361438 has 16 divisors (see below), whose sum is σ = 1917691440. Its totient is φ = 625142016.

The previous prime is 1264361437. The next prime is 1264361453. The reversal of 1264361438 is 8341634621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264361437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345245 + ... + 348887.

It is an arithmetic number, because the mean of its divisors is an integer number (119855715).

Almost surely, 2^1264361438 is an apocalyptic number.

1264361438 is a deficient number, since it is larger than the sum of its proper divisors (653330002).

1264361438 is a wasteful number, since it uses less digits than its factorization.

1264361438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5531.

The product of its digits is 82944, while the sum is 38.

The square root of 1264361438 is about 35557.8604249468. The cubic root of 1264361438 is about 1081.3270832011.

The spelling of 1264361438 in words is "one billion, two hundred sixty-four million, three hundred sixty-one thousand, four hundred thirty-eight".