1264867990 has 16 divisors (see below), whose sum is σ = 2278947600. Its totient is φ = 505461600.

The previous prime is 1264867969. The next prime is 1264868023. The reversal of 1264867990 is 997684621.

It is a happy number.

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, 49665 + ... + 70684.

It is an arithmetic number, because the mean of its divisors is an integer number (142434225).

Almost surely, 2^1264867990 is an apocalyptic number.

1264867990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1264867990 is a deficient number, since it is larger than the sum of its proper divisors (1014079610).

1264867990 is a wasteful number, since it uses less digits than its factorization.

1264867990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121407.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 1264867990 is about 35564.9826374202. The cubic root of 1264867990 is about 1081.4714710443.

The spelling of 1264867990 in words is "one billion, two hundred sixty-four million, eight hundred sixty-seven thousand, nine hundred ninety".