1806934640 has 40 divisors (see below), whose sum is σ = 4801284960. Its totient is φ = 619520256.

The previous prime is 1806934631. The next prime is 1806934663. The reversal of 1806934640 is 464396081.

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

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, 1612775 + ... + 1613894.

It is an arithmetic number, because the mean of its divisors is an integer number (120032124).

Almost surely, 2^1806934640 is an apocalyptic number.

1806934640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1806934640 is an abundant number, since it is smaller than the sum of its proper divisors (2994350320).

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

1806934640 is a wasteful number, since it uses less digits than its factorization.

1806934640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3226689 (or 3226683 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 1806934640 is about 42508.0538251282. The cubic root of 1806934640 is about 1218.0005410538. Note that the first 3 decimals are identical.

The spelling of 1806934640 in words is "one billion, eight hundred six million, nine hundred thirty-four thousand, six hundred forty".