1948317640 has 32 divisors (see below), whose sum is σ = 4641581880. Its totient is φ = 733484032.

The previous prime is 1948317617. The next prime is 1948317661. The reversal of 1948317640 is 467138491.

It can be written as a sum of positive squares in 4 ways, for example, as 1428386436 + 519931204 = 37794^2 + 22802^2 .

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, 1431907 + ... + 1433266.

Almost surely, 2^1948317640 is an apocalyptic number.

1948317640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1948317640 is an abundant number, since it is smaller than the sum of its proper divisors (2693264240).

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

1948317640 is a wasteful number, since it uses less digits than its factorization.

1948317640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865201 (or 2865197 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 1948317640 is about 44139.7512453344. The cubic root of 1948317640 is about 1248.9735872789.

The spelling of 1948317640 in words is "one billion, nine hundred forty-eight million, three hundred seventeen thousand, six hundred forty".