1881099272 has 32 divisors (see below), whose sum is σ = 3837552600. Its totient is φ = 859244544.

The previous prime is 1881099221. The next prime is 1881099293. The reversal of 1881099272 is 2729901881.

It can be written as a sum of positive squares in 4 ways, for example, as 733651396 + 1147447876 = 27086^2 + 33874^2 .

It is a super-2 number, since 2×1881099272² = 7077068942237859968, which contains 22 as substring.

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, 83147 + ... + 103322.

Almost surely, 2^1881099272 is an apocalyptic number.

It is an amenable number.

1881099272 is an abundant number, since it is smaller than the sum of its proper divisors (1956453328).

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

1881099272 is a wasteful number, since it uses less digits than its factorization.

1881099272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186585 (or 186581 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 1881099272 is about 43371.6413339408. The cubic root of 1881099272 is about 1234.4416653688.

The spelling of 1881099272 in words is "one billion, eight hundred eighty-one million, ninety-nine thousand, two hundred seventy-two".