1871605248 has 80 divisors (see below), whose sum is σ = 5158129680. Its totient is φ = 602341376.

The previous prime is 1871605247. The next prime is 1871605291. The reversal of 1871605248 is 8425061781.

It is a super-2 number, since 2×1871605248² = 7005812408682283008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1871605247) 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, 23536 + ... + 65552.

It is an arithmetic number, because the mean of its divisors is an integer number (64476621).

Almost surely, 2^1871605248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1871605248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2579064840).

1871605248 is an abundant number, since it is smaller than the sum of its proper divisors (3286524432).

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

1871605248 is an equidigital number, since it uses as much as digits as its factorization.

1871605248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42067 (or 42051 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 1871605248 is about 43262.0532106371. The cubic root of 1871605248 is about 1232.3613939505.

The spelling of 1871605248 in words is "one billion, eight hundred seventy-one million, six hundred five thousand, two hundred forty-eight".