138628051 has 8 divisors (see below), whose sum is σ = 143901504. Its totient is φ = 133451520.

The previous prime is 138628031. The next prime is 138628069. The reversal of 138628051 is 150826831.

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

It is a cyclic number.

It is not a de Polignac number, because 138628051 - 2⁹ = 138627539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138627998 and 138628016.

It is not an unprimeable number, because it can be changed into a prime (138628031) 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, 21310 + ... + 27043.

It is an arithmetic number, because the mean of its divisors is an integer number (17987688).

Almost surely, 2^138628051 is an apocalyptic number.

138628051 is a deficient number, since it is larger than the sum of its proper divisors (5273453).

138628051 is an equidigital number, since it uses as much as digits as its factorization.

138628051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48461.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 138628051 is about 11774.0414047174. The cubic root of 138628051 is about 517.5476875780.

The spelling of 138628051 in words is "one hundred thirty-eight million, six hundred twenty-eight thousand, fifty-one".