138056390 has 32 divisors (see below), whose sum is σ = 256919040. Its totient is φ = 53381344.

The previous prime is 138056383. The next prime is 138056393. The reversal of 138056390 is 93650831.

It is a self number, because there is not a number n which added to its sum of digits gives 138056390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138056393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37241 + ... + 40779.

It is an arithmetic number, because the mean of its divisors is an integer number (8028720).

Almost surely, 2^138056390 is an apocalyptic number.

138056390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138056390 is a deficient number, since it is larger than the sum of its proper divisors (118862650).

138056390 is a wasteful number, since it uses less digits than its factorization.

138056390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3676.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 138056390 is about 11749.7399971233. The cubic root of 138056390 is about 516.8353030284.

The spelling of 138056390 in words is "one hundred thirty-eight million, fifty-six thousand, three hundred ninety".