139440440 has 32 divisors (see below), whose sum is σ = 314390160. Its totient is φ = 55660800.

The previous prime is 139440437. The next prime is 139440479. The reversal of 139440440 is 44044931.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17495 + ... + 24185.

Almost surely, 2^139440440 is an apocalyptic number.

139440440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139440440 is an abundant number, since it is smaller than the sum of its proper divisors (174949720).

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

139440440 is a wasteful number, since it uses less digits than its factorization.

139440440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7223 (or 7219 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 139440440 is about 11808.4901659780. The cubic root of 139440440 is about 518.5566979017.

The spelling of 139440440 in words is "one hundred thirty-nine million, four hundred forty thousand, four hundred forty".