1941631638 has 16 divisors (see below), whose sum is σ = 3884028096. Its totient is φ = 647083080.

The previous prime is 1941631621. The next prime is 1941631651. The reversal of 1941631638 is 8361361491.

It is a self number, because there is not a number n which added to its sum of digits gives 1941631638.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4293 + ... + 62463.

It is an arithmetic number, because the mean of its divisors is an integer number (242751756).

Almost surely, 2^1941631638 is an apocalyptic number.

1941631638 is an abundant number, since it is smaller than the sum of its proper divisors (1942396458).

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

1941631638 is a wasteful number, since it uses less digits than its factorization.

1941631638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63739.

The product of its digits is 93312, while the sum is 42.

The square root of 1941631638 is about 44063.9494144590. The cubic root of 1941631638 is about 1247.5432574695.

The spelling of 1941631638 in words is "one billion, nine hundred forty-one million, six hundred thirty-one thousand, six hundred thirty-eight".