1948240638 has 24 divisors (see below), whose sum is σ = 4223521848. Its totient is φ = 649054512.

The previous prime is 1948240627. The next prime is 1948240729. The reversal of 1948240638 is 8360428491.

It is a happy number.

1948240638 is a `hidden beast` number, since 1 + 9 + 4 + 8 + 2 + 4 + 0 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1948240593 and 1948240602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4620 + ... + 62592.

It is an arithmetic number, because the mean of its divisors is an integer number (175980077).

Almost surely, 2^1948240638 is an apocalyptic number.

1948240638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1948240638 is an abundant number, since it is smaller than the sum of its proper divisors (2275281210).

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

1948240638 is a wasteful number, since it uses less digits than its factorization.

1948240638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59848 (or 59845 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 1948240638 is about 44138.8789844056. The cubic root of 1948240638 is about 1248.9571329580.

The spelling of 1948240638 in words is "one billion, nine hundred forty-eight million, two hundred forty thousand, six hundred thirty-eight".