138457650 has 24 divisors (see below), whose sum is σ = 343375344. Its totient is φ = 36922000.

The previous prime is 138457637. The next prime is 138457651. The reversal of 138457650 is 56754831.

It is a junction number, because it is equal to n+sod(n) for n = 138457599 and 138457608.

It is not an unprimeable number, because it can be changed into a prime (138457651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461376 + ... + 461675.

It is an arithmetic number, because the mean of its divisors is an integer number (14307306).

Almost surely, 2^138457650 is an apocalyptic number.

138457650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138457650 is an abundant number, since it is smaller than the sum of its proper divisors (204917694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138457650 is a wasteful number, since it uses less digits than its factorization.

138457650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923066 (or 923061 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 138457650 is about 11766.8028792871. The cubic root of 138457650 is about 517.3355448405.

The spelling of 138457650 in words is "one hundred thirty-eight million, four hundred fifty-seven thousand, six hundred fifty".