1264431730 has 16 divisors (see below), whose sum is σ = 2278704960. Its totient is φ = 505166512.

The previous prime is 1264431691. The next prime is 1264431757. The reversal of 1264431730 is 371344621.

It is a junction number, because it is equal to n+sod(n) for n = 1264431692 and 1264431701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66964 + ... + 83743.

It is an arithmetic number, because the mean of its divisors is an integer number (142419060).

Almost surely, 2^1264431730 is an apocalyptic number.

1264431730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1264431730 is a deficient number, since it is larger than the sum of its proper divisors (1014273230).

1264431730 is a wasteful number, since it uses less digits than its factorization.

1264431730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151553.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 1264431730 is about 35558.8488283859. The cubic root of 1264431730 is about 1081.3471215732.

The spelling of 1264431730 in words is "one billion, two hundred sixty-four million, four hundred thirty-one thousand, seven hundred thirty".