1272268690 has 192 divisors, whose sum is σ = 3160166400. Its totient is φ = 357540480.

The previous prime is 1272268609. The next prime is 1272268691. The reversal of 1272268690 is 968622721.

It is a super-2 number, since 2×1272268690² = 3237335239108632200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272268691) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6393211 + ... + 6393409.

It is an arithmetic number, because the mean of its divisors is an integer number (16459200).

Almost surely, 2^1272268690 is an apocalyptic number.

1272268690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272268690 is an abundant number, since it is smaller than the sum of its proper divisors (1887897710).

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

1272268690 is a wasteful number, since it uses less digits than its factorization.

1272268690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 1272268690 is about 35668.8756481053. The cubic root of 1272268690 is about 1083.5765884253.

It can be divided in two parts, 1272 and 268690, that added together give a palindrome (269962).

The spelling of 1272268690 in words is "one billion, two hundred seventy-two million, two hundred sixty-eight thousand, six hundred ninety".