138887226 has 48 divisors (see below), whose sum is σ = 318333600. Its totient is φ = 43641504.

The previous prime is 138887197. The next prime is 138887237. The reversal of 138887226 is 622788831.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76740 + ... + 78528.

It is an arithmetic number, because the mean of its divisors is an integer number (6631950).

Almost surely, 2^138887226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138887226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159166800).

138887226 is an abundant number, since it is smaller than the sum of its proper divisors (179446374).

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

138887226 is a wasteful number, since it uses less digits than its factorization.

138887226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043 (or 2040 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 138887226 is about 11785.0424691640. The cubic root of 138887226 is about 517.8700175244.

It can be divided in two parts, 138 and 887226, that added together give a square (887364 = 942²).

The spelling of 138887226 in words is "one hundred thirty-eight million, eight hundred eighty-seven thousand, two hundred twenty-six".