139950640 has 20 divisors (see below), whose sum is σ = 325385424. Its totient is φ = 55980224.

The previous prime is 139950623. The next prime is 139950641. The reversal of 139950640 is 46059931.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 139950640.

It is not an unprimeable number, because it can be changed into a prime (139950641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874612 + ... + 874771.

Almost surely, 2^139950640 is an apocalyptic number.

139950640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139950640 is an abundant number, since it is smaller than the sum of its proper divisors (185434784).

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

139950640 is a wasteful number, since it uses less digits than its factorization.

139950640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749396 (or 1749390 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 139950640 is about 11830.0735416142. The cubic root of 139950640 is about 519.1883788431.

The spelling of 139950640 in words is "one hundred thirty-nine million, nine hundred fifty thousand, six hundred forty".