1941268638 has 32 divisors (see below), whose sum is σ = 3921063552. Its totient is φ = 640700000.

The previous prime is 1941268631. The next prime is 1941268661. The reversal of 1941268638 is 8368621491.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1941268631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256813 + ... + 264263.

It is an arithmetic number, because the mean of its divisors is an integer number (122533236).

Almost surely, 2^1941268638 is an apocalyptic number.

1941268638 is an abundant number, since it is smaller than the sum of its proper divisors (1979794914).

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

1941268638 is a wasteful number, since it uses less digits than its factorization.

1941268638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7880.

The product of its digits is 497664, while the sum is 48.

The square root of 1941268638 is about 44059.8302084790. The cubic root of 1941268638 is about 1247.4655073241.

The spelling of 1941268638 in words is "one billion, nine hundred forty-one million, two hundred sixty-eight thousand, six hundred thirty-eight".