1338024478 has 20 divisors (see below), whose sum is σ = 2341411920. Its totient is φ = 573437004.

The previous prime is 1338024473. The next prime is 1338024503. The reversal of 1338024478 is 8744208331.

It is a self number, because there is not a number n which added to its sum of digits gives 1338024478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338024473) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 134518 + ... + 144121.

It is an arithmetic number, because the mean of its divisors is an integer number (117070596).

Almost surely, 2^1338024478 is an apocalyptic number.

1338024478 is a deficient number, since it is larger than the sum of its proper divisors (1003387442).

1338024478 is an frugal number, since it uses more digits than its factorization.

1338024478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278669 (or 278648 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 1338024478 is about 36579.0169086049. The cubic root of 1338024478 is about 1101.9317235969.

The spelling of 1338024478 in words is "one billion, three hundred thirty-eight million, twenty-four thousand, four hundred seventy-eight".