1939834890 has 96 divisors (see below), whose sum is σ = 5919937920. Its totient is φ = 431402112.

The previous prime is 1939834847. The next prime is 1939834891. The reversal of 1939834890 is 984389391.

It is a super-2 number, since 2×1939834890² = 7525918800922624200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1939834891) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18300 + ... + 64919.

It is an arithmetic number, because the mean of its divisors is an integer number (61666020).

Almost surely, 2^1939834890 is an apocalyptic number.

1939834890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1939834890 is an abundant number, since it is smaller than the sum of its proper divisors (3980103030).

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

1939834890 is a wasteful number, since it uses less digits than its factorization.

1939834890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83276 (or 83273 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 1939834890 is about 44043.5567364853. The cubic root of 1939834890 is about 1247.1583213185.

The spelling of 1939834890 in words is "one billion, nine hundred thirty-nine million, eight hundred thirty-four thousand, eight hundred ninety".