139777238 has 16 divisors (see below), whose sum is σ = 211783680. Its totient is φ = 69186600.

The previous prime is 139777237. The next prime is 139777273. The reversal of 139777238 is 832777931.

It is a junction number, because it is equal to n+sod(n) for n = 139777192 and 139777201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139777237) by changing a digit.

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, 90533 + ... + 92063.

It is an arithmetic number, because the mean of its divisors is an integer number (13236480).

Almost surely, 2^139777238 is an apocalyptic number.

139777238 is a deficient number, since it is larger than the sum of its proper divisors (72006442).

139777238 is a wasteful number, since it uses less digits than its factorization.

139777238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963.

The product of its digits is 444528, while the sum is 47.

The square root of 139777238 is about 11822.7424060579. The cubic root of 139777238 is about 518.9738615170.

The spelling of 139777238 in words is "one hundred thirty-nine million, seven hundred seventy-seven thousand, two hundred thirty-eight".