1268631000 has 384 divisors, whose sum is σ = 5280912000. Its totient is φ = 267494400.

The previous prime is 1268630963. The next prime is 1268631017. The reversal of 1268631000 is 1368621.

1268631000 is a `hidden beast` number, since 1 + 26 + 8 + 631 + 0 + 0 + 0 = 666.

It is a super-2 number, since 2×1268631000² = 3218849228322000000, which contains 22 as substring.

It is a congruent number.

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 95 ways as a sum of consecutive naturals, for example, 818226 + ... + 819774.

It is an arithmetic number, because the mean of its divisors is an integer number (13752375).

Almost surely, 2^1268631000 is an apocalyptic number.

1268631000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1268631000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2640456000).

1268631000 is an abundant number, since it is smaller than the sum of its proper divisors (4012281000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1268631000 is a wasteful number, since it uses less digits than its factorization.

1268631000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596 (or 1579 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1268631000 is about 35617.8466502398. The cubic root of 1268631000 is about 1082.5428763728.

Adding to 1268631000 its reverse (1368621), we get a palindrome (1269999621).

The spelling of 1268631000 in words is "one billion, two hundred sixty-eight million, six hundred thirty-one thousand".