1941666840 has 96 divisors (see below), whose sum is σ = 6318814320. Its totient is φ = 517089024.

The previous prime is 1941666799. The next prime is 1941666851. The reversal of 1941666840 is 486661491.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 303919 + ... + 310241.

Almost surely, 2^1941666840 is an apocalyptic number.

1941666840 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 1941666840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3159407160).

1941666840 is an abundant number, since it is smaller than the sum of its proper divisors (4377147480).

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

1941666840 is a wasteful number, since it uses less digits than its factorization.

1941666840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7193 (or 7186 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 1941666840 is about 44064.3488548282. The cubic root of 1941666840 is about 1247.5507967905.

The spelling of 1941666840 in words is "one billion, nine hundred forty-one million, six hundred sixty-six thousand, eight hundred forty".