1267952638 has 16 divisors (see below), whose sum is σ = 1974646656. Its totient is φ = 609973920.

The previous prime is 1267952629. The next prime is 1267952639. The reversal of 1267952638 is 8362597621.

It is a super-2 number, since 2×1267952638² = 3215407784422318088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1267952591 and 1267952600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267952639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48381 + ... + 69832.

It is an arithmetic number, because the mean of its divisors is an integer number (123415416).

Almost surely, 2^1267952638 is an apocalyptic number.

1267952638 is a deficient number, since it is larger than the sum of its proper divisors (706694018).

1267952638 is a wasteful number, since it uses less digits than its factorization.

1267952638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118419.

The product of its digits is 1088640, while the sum is 49.

The square root of 1267952638 is about 35608.3225945845. The cubic root of 1267952638 is about 1082.3498896332.

The spelling of 1267952638 in words is "one billion, two hundred sixty-seven million, nine hundred fifty-two thousand, six hundred thirty-eight".