139271640 has 32 divisors (see below), whose sum is σ = 417815280. Its totient is φ = 37139072.

The previous prime is 139271611. The next prime is 139271677. The reversal of 139271640 is 46172931.

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, 580179 + ... + 580418.

Almost surely, 2^139271640 is an apocalyptic number.

139271640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139271640 is an abundant number, since it is smaller than the sum of its proper divisors (278543640).

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

139271640 is a wasteful number, since it uses less digits than its factorization.

139271640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160611 (or 1160607 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 139271640 is about 11801.3406018130. The cubic root of 139271640 is about 518.3473666747.

The spelling of 139271640 in words is "one hundred thirty-nine million, two hundred seventy-one thousand, six hundred forty".