1336442640 has 160 divisors (see below), whose sum is σ = 4488462720. Its totient is φ = 326995968.

The previous prime is 1336442633. The next prime is 1336442659. The reversal of 1336442640 is 462446331.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 557284 + ... + 559676.

It is an arithmetic number, because the mean of its divisors is an integer number (28052892).

Almost surely, 2^1336442640 is an apocalyptic number.

1336442640 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 1336442640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2244231360).

1336442640 is an abundant number, since it is smaller than the sum of its proper divisors (3152020080).

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

1336442640 is a wasteful number, since it uses less digits than its factorization.

1336442640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2601 (or 2595 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 1336442640 is about 36557.3883093418. The cubic root of 1336442640 is about 1101.4973108105.

Adding to 1336442640 its reverse (462446331), we get a palindrome (1798888971).

The spelling of 1336442640 in words is "one billion, three hundred thirty-six million, four hundred forty-two thousand, six hundred forty".