1946390838 has 48 divisors (see below), whose sum is σ = 4540734000. Its totient is φ = 554589504.

The previous prime is 1946390833. The next prime is 1946390839. The reversal of 1946390838 is 8380936491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1946390833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100788 + ... + 118536.

It is an arithmetic number, because the mean of its divisors is an integer number (94598625).

Almost surely, 2^1946390838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1946390838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2270367000).

1946390838 is an abundant number, since it is smaller than the sum of its proper divisors (2594343162).

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

1946390838 is a wasteful number, since it uses less digits than its factorization.

1946390838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18141 (or 18134 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 1946390838 is about 44117.9196925694. The cubic root of 1946390838 is about 1248.5617244989.

The spelling of 1946390838 in words is "one billion, nine hundred forty-six million, three hundred ninety thousand, eight hundred thirty-eight".