1264315690 has 24 divisors (see below), whose sum is σ = 2501466660. Its totient is φ = 459750720.

The previous prime is 1264315631. The next prime is 1264315693. The reversal of 1264315690 is 965134621.

It can be written as a sum of positive squares in 2 ways, for example, as 1183153609 + 81162081 = 34397^2 + 9009^2 .

It is a super-2 number, since 2×1264315690² = 3196988327960352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1264315693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 521235 + ... + 523654.

Almost surely, 2^1264315690 is an apocalyptic number.

1264315690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1264315690 is a deficient number, since it is larger than the sum of its proper divisors (1237150970).

1264315690 is a wasteful number, since it uses less digits than its factorization.

1264315690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044918 (or 1044907 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 1264315690 is about 35557.2171295786. The cubic root of 1264315690 is about 1081.3140412690.

The spelling of 1264315690 in words is "one billion, two hundred sixty-four million, three hundred fifteen thousand, six hundred ninety".