1940417640 has 384 divisors, whose sum is σ = 7735219200. Its totient is φ = 431101440.

The previous prime is 1940417639. The next prime is 1940417657. The reversal of 1940417640 is 467140491.

1940417640 is a `hidden beast` number, since 1 + 9 + 4 + 0 + 4 + 1 + 7 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1940417595 and 1940417604.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1957545 + ... + 1958535.

It is an arithmetic number, because the mean of its divisors is an integer number (20143800).

Almost surely, 2^1940417640 is an apocalyptic number.

1940417640 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 1940417640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3867609600).

1940417640 is an abundant number, since it is smaller than the sum of its proper divisors (5794801560).

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

1940417640 is a wasteful number, since it uses less digits than its factorization.

1940417640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1940417640 is about 44050.1718498350. The cubic root of 1940417640 is about 1247.2831959920.

The spelling of 1940417640 in words is "one billion, nine hundred forty million, four hundred seventeen thousand, six hundred forty".