1938918401 has 8 divisors (see below), whose sum is σ = 2263054080. Its totient is φ = 1626569568.

The previous prime is 1938918349. The next prime is 1938918407. The reversal of 1938918401 is 1048198391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1938918401 - 2¹⁸ = 1938656257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1938918407) 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, 2946356 + ... + 2947013.

It is an arithmetic number, because the mean of its divisors is an integer number (282881760).

Almost surely, 2^1938918401 is an apocalyptic number.

It is an amenable number.

1938918401 is a deficient number, since it is larger than the sum of its proper divisors (324135679).

1938918401 is an equidigital number, since it uses as much as digits as its factorization.

1938918401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5893423.

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 1938918401 is about 44033.1511590983. The cubic root of 1938918401 is about 1246.9618807274.

The spelling of 1938918401 in words is "one billion, nine hundred thirty-eight million, nine hundred eighteen thousand, four hundred one".