1941488640 has 528 divisors, whose sum is σ = 8297522688. Its totient is φ = 408748032.

The previous prime is 1941488639. The next prime is 1941488641. The reversal of 1941488640 is 468841491.

It is an interprime number because it is at equal distance from previous prime (1941488639) and next prime (1941488641).

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

It is not an unprimeable number, because it can be changed into a prime (1941488641) 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, 4193049 + ... + 4193511.

Almost surely, 2^1941488640 is an apocalyptic number.

1941488640 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 1941488640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4148761344).

1941488640 is an abundant number, since it is smaller than the sum of its proper divisors (6356034048).

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

1941488640 is a wasteful number, since it uses less digits than its factorization.

1941488640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 1941488640 is about 44062.3267656169. The cubic root of 1941488640 is about 1247.5126302096.

The spelling of 1941488640 in words is "one billion, nine hundred forty-one million, four hundred eighty-eight thousand, six hundred forty".