139520438 has 8 divisors (see below), whose sum is σ = 218379888. Its totient is φ = 66727144.

The previous prime is 139520413. The next prime is 139520449. The reversal of 139520438 is 834025931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 139520398 and 139520407.

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 3 ways as a sum of consecutive naturals, for example, 1516481 + ... + 1516572.

It is an arithmetic number, because the mean of its divisors is an integer number (27297486).

Almost surely, 2^139520438 is an apocalyptic number.

139520438 is a deficient number, since it is larger than the sum of its proper divisors (78859450).

139520438 is a wasteful number, since it uses less digits than its factorization.

139520438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033078.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 139520438 is about 11811.8769888617. The cubic root of 139520438 is about 518.6558455333.

The spelling of 139520438 in words is "one hundred thirty-nine million, five hundred twenty thousand, four hundred thirty-eight".