1939095040 has 80 divisors (see below), whose sum is σ = 4851573408. Its totient is φ = 741892096.

The previous prime is 1939095013. The next prime is 1939095071. The reversal of 1939095040 is 405909391.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1939094984 and 1939095002.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 42414 + ... + 75346.

Almost surely, 2^1939095040 is an apocalyptic number.

1939095040 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 1939095040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2425786704).

1939095040 is an abundant number, since it is smaller than the sum of its proper divisors (2912478368).

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

1939095040 is an equidigital number, since it uses as much as digits as its factorization.

1939095040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32979 (or 32963 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 1939095040 is about 44035.1568635789. The cubic root of 1939095040 is about 1246.9997464108. Note that the first 3 decimals are identical.

The spelling of 1939095040 in words is "one billion, nine hundred thirty-nine million, ninety-five thousand, forty".