139267640 has 16 divisors (see below), whose sum is σ = 313352280. Its totient is φ = 55707040.

The previous prime is 139267637. The next prime is 139267649. The reversal of 139267640 is 46762931.

It is a junction number, because it is equal to n+sod(n) for n = 139267594 and 139267603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139267649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1740806 + ... + 1740885.

Almost surely, 2^139267640 is an apocalyptic number.

139267640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139267640 is an abundant number, since it is smaller than the sum of its proper divisors (174084640).

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

139267640 is a wasteful number, since it uses less digits than its factorization.

139267640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481702 (or 3481698 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 139267640 is about 11801.1711283245. The cubic root of 139267640 is about 518.3424041680.

The spelling of 139267640 in words is "one hundred thirty-nine million, two hundred sixty-seven thousand, six hundred forty".