1941143640 has 192 divisors, whose sum is σ = 6238632960. Its totient is φ = 483072000.

The previous prime is 1941143599. The next prime is 1941143651. The reversal of 1941143640 is 463411491.

It is a super-2 number, since 2×1941143640² = 7536077262224899200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7733515 + ... + 7733765.

It is an arithmetic number, because the mean of its divisors is an integer number (32492880).

Almost surely, 2^1941143640 is an apocalyptic number.

1941143640 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 1941143640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3119316480).

1941143640 is an abundant number, since it is smaller than the sum of its proper divisors (4297489320).

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

1941143640 is a wasteful number, since it uses less digits than its factorization.

1941143640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1941143640 is about 44058.4116826742. The cubic root of 1941143640 is about 1247.4387320430.

The spelling of 1941143640 in words is "one billion, nine hundred forty-one million, one hundred forty-three thousand, six hundred forty".