1438660842 has 16 divisors (see below), whose sum is σ = 2898023520. Its totient is φ = 476103312.

The previous prime is 1438660841. The next prime is 1438660889. The reversal of 1438660842 is 2480668341.

It is a super-3 number, since 3×1438660842³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1438660794 and 1438660803.

It is not an unprimeable number, because it can be changed into a prime (1438660841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861673 + ... + 863340.

It is an arithmetic number, because the mean of its divisors is an integer number (181126470).

Almost surely, 2^1438660842 is an apocalyptic number.

1438660842 is an abundant number, since it is smaller than the sum of its proper divisors (1459362678).

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

1438660842 is a wasteful number, since it uses less digits than its factorization.

1438660842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725157.

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 1438660842 is about 37929.6828618432. The cubic root of 1438660842 is about 1128.8930716637.

The spelling of 1438660842 in words is "one billion, four hundred thirty-eight million, six hundred sixty thousand, eight hundred forty-two".