1390000137640 has 16 divisors (see below), whose sum is σ = 3127500309780. Its totient is φ = 556000055040.

The previous prime is 1390000137607. The next prime is 1390000137649. The reversal of 1390000137640 is 467310000931.

It can be written as a sum of positive squares in 2 ways, for example, as 1177012349604 + 212987788036 = 1084902^2 + 461506^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1390000137596 and 1390000137605.

It is not an unprimeable number, because it can be changed into a prime (1390000137649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17375001681 + ... + 17375001760.

Almost surely, 2^{1390000137640} is an apocalyptic number.

1390000137640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390000137640 is an abundant number, since it is smaller than the sum of its proper divisors (1737500172140).

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

1390000137640 is a wasteful number, since it uses less digits than its factorization.

1390000137640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34750003452 (or 34750003448 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 1390000137640 in words is "one trillion, three hundred ninety billion, one hundred thirty-seven thousand, six hundred forty".