1939941900 has 504 divisors, whose sum is σ = 7172353440. Its totient is φ = 451630080.

The previous prime is 1939941869. The next prime is 1939941911. The reversal of 1939941900 is 91499391.

It is a super-2 number, since 2×1939941900² = 7526749150751220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 167 ways as a sum of consecutive naturals, for example, 21797056 + ... + 21797144.

It is an arithmetic number, because the mean of its divisors is an integer number (14230860).

Almost surely, 2^1939941900 is an apocalyptic number.

1939941900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1939941900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3586176720).

1939941900 is an abundant number, since it is smaller than the sum of its proper divisors (5232411540).

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

1939941900 is a wasteful number, since it uses less digits than its factorization.

1939941900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The square root of 1939941900 is about 44044.7715398775. The cubic root of 1939941900 is about 1247.1812538472.

The spelling of 1939941900 in words is "one billion, nine hundred thirty-nine million, nine hundred forty-one thousand, nine hundred".