1448891911 has 12 divisors (see below), whose sum is σ = 1531050024. Its totient is φ = 1370941200.

The previous prime is 1448891903. The next prime is 1448891921. The reversal of 1448891911 is 1191988441.

It is a happy number.

It is not a de Polignac number, because 1448891911 - 2³ = 1448891903 is a prime.

It is a super-2 number, since 2×1448891911² = 4198575539522463842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1448891921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 366616 + ... + 370546.

It is an arithmetic number, because the mean of its divisors is an integer number (127587502).

Almost surely, 2^1448891911 is an apocalyptic number.

1448891911 is a deficient number, since it is larger than the sum of its proper divisors (82158113).

1448891911 is a wasteful number, since it uses less digits than its factorization.

1448891911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4990 (or 4971 counting only the distinct ones).

The product of its digits is 82944, while the sum is 46.

The square root of 1448891911 is about 38064.3128271088. The cubic root of 1448891911 is about 1131.5628025193.

The spelling of 1448891911 in words is "one billion, four hundred forty-eight million, eight hundred ninety-one thousand, nine hundred eleven".