139240687392 has 72 divisors (see below), whose sum is σ = 410631124176. Its totient is φ = 46413559872.

The previous prime is 139240687361. The next prime is 139240687447. The reversal of 139240687392 is 293786042931.

139240687392 is a `hidden beast` number, since 1 + 3 + 9 + 240 + 6 + 8 + 7 + 392 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8945458 + ... + 8961009.

It is an arithmetic number, because the mean of its divisors is an integer number (5703210058).

Almost surely, 2^139240687392 is an apocalyptic number.

139240687392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

139240687392 is an abundant number, since it is smaller than the sum of its proper divisors (271390436784).

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

139240687392 is an equidigital number, since it uses as much as digits as its factorization.

139240687392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17906492 (or 17906472 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 139240687392 in words is "one hundred thirty-nine billion, two hundred forty million, six hundred eighty-seven thousand, three hundred ninety-two".