1307138439690 has 24 divisors (see below), whose sum is σ = 3398559943428. Its totient is φ = 348570250560.

The previous prime is 1307138439647. The next prime is 1307138439697. The reversal of 1307138439690 is 969348317031.

It is a happy number.

1307138439690 is a `hidden beast` number, since 1 + 30 + 7 + 138 + 4 + 396 + 90 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1279656425961 + 27482013729 = 1131219^2 + 165777^2 .

It is a super-2 number, since 2×1307138439690² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1307138439697) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7261880131 + ... + 7261880310.

Almost surely, 2^{1307138439690} is an apocalyptic number.

1307138439690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1307138439690 is an abundant number, since it is smaller than the sum of its proper divisors (2091421503738).

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

1307138439690 is a wasteful number, since it uses less digits than its factorization.

1307138439690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14523760454 (or 14523760451 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 1307138439690 in words is "one trillion, three hundred seven billion, one hundred thirty-eight million, four hundred thirty-nine thousand, six hundred ninety".