139235386 has 8 divisors (see below), whose sum is σ = 208911060. Its totient is φ = 69598368.

The previous prime is 139235381. The next prime is 139235387. The reversal of 139235386 is 683532931.

139235386 = T₉₆₃₃ + T₉₆₃₄ + T₉₆₃₅.

It can be written as a sum of positive squares in 2 ways, for example, as 118396161 + 20839225 = 10881^2 + 4565^2 .

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

It is not an unprimeable number, because it can be changed into a prime (139235381) 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, 2310 + ... + 16846.

Almost surely, 2^139235386 is an apocalyptic number.

139235386 is the 9635-th centered triangular number.

139235386 is a deficient number, since it is larger than the sum of its proper divisors (69675674).

139235386 is a wasteful number, since it uses less digits than its factorization.

139235386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19328.

The product of its digits is 116640, while the sum is 40.

The square root of 139235386 is about 11799.8044899058. The cubic root of 139235386 is about 518.3023855230.

The spelling of 139235386 in words is "one hundred thirty-nine million, two hundred thirty-five thousand, three hundred eighty-six".