1809297152 has 36 divisors (see below), whose sum is σ = 3889343640. Its totient is φ = 835058688.

The previous prime is 1809297121. The next prime is 1809297187. The reversal of 1809297152 is 2517929081.

It is a happy number.

It is a super-2 number, since 2×1809297152² = 6547112368470622208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268502 + ... + 275157.

Almost surely, 2^1809297152 is an apocalyptic number.

It is an amenable number.

1809297152 is an abundant number, since it is smaller than the sum of its proper divisors (2080046488).

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

1809297152 is an equidigital number, since it uses as much as digits as its factorization.

1809297152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543688 (or 543674 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 1809297152 is about 42535.8337405064. The cubic root of 1809297152 is about 1218.5311427409.

The spelling of 1809297152 in words is "one billion, eight hundred nine million, two hundred ninety-seven thousand, one hundred fifty-two".