139471438 has 8 divisors (see below), whose sum is σ = 220218120. Its totient is φ = 66065400.

The previous prime is 139471433. The next prime is 139471481. The reversal of 139471438 is 834174931.

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

It is a self number, because there is not a number n which added to its sum of digits gives 139471438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139471433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1835113 + ... + 1835188.

It is an arithmetic number, because the mean of its divisors is an integer number (27527265).

Almost surely, 2^139471438 is an apocalyptic number.

139471438 is a deficient number, since it is larger than the sum of its proper divisors (80746682).

139471438 is a wasteful number, since it uses less digits than its factorization.

139471438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670322.

The product of its digits is 72576, while the sum is 40.

The square root of 139471438 is about 11809.8026232448. The cubic root of 139471438 is about 518.5951205897.

The spelling of 139471438 in words is "one hundred thirty-nine million, four hundred seventy-one thousand, four hundred thirty-eight".