1438940408988 has 96 divisors (see below), whose sum is σ = 3575057704960. Its totient is φ = 449655909120.

The previous prime is 1438940408977. The next prime is 1438940409031. The reversal of 1438940408988 is 8898040498341.

It is a super-2 number, since 2×1438940408988² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 2923695 + ... + 3380217.

Almost surely, 2^{1438940408988} is an apocalyptic number.

It is an amenable number.

1438940408988 is an abundant number, since it is smaller than the sum of its proper divisors (2136117295972).

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

1438940408988 is a wasteful number, since it uses less digits than its factorization.

1438940408988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456827 (or 456825 counting only the distinct ones).

The product of its (nonzero) digits is 63700992, while the sum is 66.

The spelling of 1438940408988 in words is "one trillion, four hundred thirty-eight billion, nine hundred forty million, four hundred eight thousand, nine hundred eighty-eight".