1801336782 has 16 divisors (see below), whose sum is σ = 4117341312. Its totient is φ = 514667640.

The previous prime is 1801336759. The next prime is 1801336783. The reversal of 1801336782 is 2876331081.

It is a super-2 number, since 2×1801336782² = 6489628404372231048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1801336782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801336783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21444444 + ... + 21444527.

It is an arithmetic number, because the mean of its divisors is an integer number (257333832).

Almost surely, 2^1801336782 is an apocalyptic number.

1801336782 is an abundant number, since it is smaller than the sum of its proper divisors (2316004530).

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

1801336782 is a wasteful number, since it uses less digits than its factorization.

1801336782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42888983.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 1801336782 is about 42442.1580742544. The cubic root of 1801336782 is about 1216.7414571234.

The spelling of 1801336782 in words is "one billion, eight hundred one million, three hundred thirty-six thousand, seven hundred eighty-two".