1338490920 has 256 divisors, whose sum is σ = 4694215680. Its totient is φ = 302284800.

The previous prime is 1338490919. The next prime is 1338490931. The reversal of 1338490920 is 290948331.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1086705 + ... + 1087935.

It is an arithmetic number, because the mean of its divisors is an integer number (18336780).

Almost surely, 2^1338490920 is an apocalyptic number.

1338490920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1338490920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2347107840).

1338490920 is an abundant number, since it is smaller than the sum of its proper divisors (3355724760).

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

1338490920 is a wasteful number, since it uses less digits than its factorization.

1338490920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316 (or 1312 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 1338490920 is about 36585.3921668198. The cubic root of 1338490920 is about 1102.0597550171.

The spelling of 1338490920 in words is "one billion, three hundred thirty-eight million, four hundred ninety thousand, nine hundred twenty".