1438239660 has 96 divisors (see below), whose sum is σ = 4731132672. Its totient is φ = 321841920.

The previous prime is 1438239653. The next prime is 1438239689. The reversal of 1438239660 is 669328341.

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, 75234 + ... + 92393.

It is an arithmetic number, because the mean of its divisors is an integer number (49282632).

Almost surely, 2^1438239660 is an apocalyptic number.

1438239660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1438239660 is an abundant number, since it is smaller than the sum of its proper divisors (3292893012).

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

1438239660 is a wasteful number, since it uses less digits than its factorization.

1438239660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167663 (or 167661 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 1438239660 is about 37924.1303130342. The cubic root of 1438239660 is about 1128.7828960905.

The spelling of 1438239660 in words is "one billion, four hundred thirty-eight million, two hundred thirty-nine thousand, six hundred sixty".