1267990340 has 24 divisors (see below), whose sum is σ = 2663720640. Its totient is φ = 507016928.

The previous prime is 1267990331. The next prime is 1267990357. The reversal of 1267990340 is 430997621.

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, 56921 + ... + 75999.

It is an arithmetic number, because the mean of its divisors is an integer number (110988360).

Almost surely, 2^1267990340 is an apocalyptic number.

1267990340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1267990340 is an abundant number, since it is smaller than the sum of its proper divisors (1395730300).

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

1267990340 is a wasteful number, since it uses less digits than its factorization.

1267990340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22411 (or 22409 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 1267990340 is about 35608.8519893579. The cubic root of 1267990340 is about 1082.3606172556.

The spelling of 1267990340 in words is "one billion, two hundred sixty-seven million, nine hundred ninety thousand, three hundred forty".