1948879881 has 36 divisors (see below), whose sum is σ = 3220465612. Its totient is φ = 1128743424.

The previous prime is 1948879871. The next prime is 1948879909. The reversal of 1948879881 is 1889788491.

1948879881 is a `hidden beast` number, since 1 + 9 + 488 + 79 + 8 + 81 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 42771600 + 1906108281 = 6540^2 + 43659^2 .

It is not a de Polignac number, because 1948879881 - 2¹⁰ = 1948878857 is a prime.

It is a super-2 number, since 2×1948879881² = 7596265581133148322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1948879871) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4995 + ... + 62631.

Almost surely, 2^1948879881 is an apocalyptic number.

It is an amenable number.

1948879881 is a deficient number, since it is larger than the sum of its proper divisors (1271585731).

1948879881 is a wasteful number, since it uses less digits than its factorization.

1948879881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57690 (or 57670 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 63.

The square root of 1948879881 is about 44146.1196596032. The cubic root of 1948879881 is about 1249.0937176940.

The spelling of 1948879881 in words is "one billion, nine hundred forty-eight million, eight hundred seventy-nine thousand, eight hundred eighty-one".