138862260 has 108 divisors (see below), whose sum is σ = 444759588. Its totient is φ = 35064576.

The previous prime is 138862259. The next prime is 138862271. The reversal of 138862260 is 62268831.

138862260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 24029604 + 114832656 = 4902^2 + 10716^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 63912 + ... + 66048.

Almost surely, 2^138862260 is an apocalyptic number.

138862260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138862260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222379794).

138862260 is an abundant number, since it is smaller than the sum of its proper divisors (305897328).

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

138862260 is a wasteful number, since it uses less digits than its factorization.

138862260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190 (or 2166 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 138862260 is about 11783.9831975440. The cubic root of 138862260 is about 517.8389853506.

The spelling of 138862260 in words is "one hundred thirty-eight million, eight hundred sixty-two thousand, two hundred sixty".