1828722261 has 16 divisors (see below), whose sum is σ = 2464989120. Its totient is φ = 1205827200.

The previous prime is 1828722253. The next prime is 1828722263. The reversal of 1828722261 is 1622278281.

It is not a de Polignac number, because 1828722261 - 2³ = 1828722253 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1828722263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358950 + ... + 364008.

It is an arithmetic number, because the mean of its divisors is an integer number (154061820).

Almost surely, 2^1828722261 is an apocalyptic number.

It is an amenable number.

1828722261 is a deficient number, since it is larger than the sum of its proper divisors (636266859).

1828722261 is a wasteful number, since it uses less digits than its factorization.

1828722261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6356.

The product of its digits is 43008, while the sum is 39.

The square root of 1828722261 is about 42763.5623048408. The cubic root of 1828722261 is about 1222.8764566759.

The spelling of 1828722261 in words is "one billion, eight hundred twenty-eight million, seven hundred twenty-two thousand, two hundred sixty-one".