1948272891 has 16 divisors (see below), whose sum is σ = 2776757760. Its totient is φ = 1212073280.

The previous prime is 1948272883. The next prime is 1948272917. The reversal of 1948272891 is 1982728491.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1948272891 - 2³ = 1948272883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1948272871) 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, 341511 + ... + 347168.

It is an arithmetic number, because the mean of its divisors is an integer number (173547360).

Almost surely, 2^1948272891 is an apocalyptic number.

1948272891 is a deficient number, since it is larger than the sum of its proper divisors (828484869).

1948272891 is a wasteful number, since it uses less digits than its factorization.

1948272891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688746.

The product of its digits is 580608, while the sum is 51.

The square root of 1948272891 is about 44139.2443410623. The cubic root of 1948272891 is about 1248.9640250553.

The spelling of 1948272891 in words is "one billion, nine hundred forty-eight million, two hundred seventy-two thousand, eight hundred ninety-one".