1781342960 has 40 divisors (see below), whose sum is σ = 4385250576. Its totient is φ = 670622720.

The previous prime is 1781342917. The next prime is 1781342993. The reversal of 1781342960 is 692431871.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1781342960² = 6346365482283123200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653546 + ... + 656265.

Almost surely, 2^1781342960 is an apocalyptic number.

1781342960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1781342960 is an abundant number, since it is smaller than the sum of its proper divisors (2603907616).

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

1781342960 is a wasteful number, since it uses less digits than its factorization.

1781342960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309841 (or 1309835 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1781342960 is about 42205.9588210006. The cubic root of 1781342960 is about 1212.2229835857. Note that the first 3 decimals are identical.

The spelling of 1781342960 in words is "one billion, seven hundred eighty-one million, three hundred forty-two thousand, nine hundred sixty".