1948398447 has 16 divisors (see below), whose sum is σ = 2608721280. Its totient is φ = 1293516000.

The previous prime is 1948398443. The next prime is 1948398457. The reversal of 1948398447 is 7448938491.

It is a happy number.

It is not a de Polignac number, because 1948398447 - 2² = 1948398443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1948398443) 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, 1342072 + ... + 1343522.

It is an arithmetic number, because the mean of its divisors is an integer number (163045080).

Almost surely, 2^1948398447 is an apocalyptic number.

1948398447 is a deficient number, since it is larger than the sum of its proper divisors (660322833).

1948398447 is a wasteful number, since it uses less digits than its factorization.

1948398447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014.

The product of its digits is 6967296, while the sum is 57.

The square root of 1948398447 is about 44140.6665898919. Note that the first 3 decimals coincide. The cubic root of 1948398447 is about 1248.9908542124.

The spelling of 1948398447 in words is "one billion, nine hundred forty-eight million, three hundred ninety-eight thousand, four hundred forty-seven".