138732750 has 320 divisors, whose sum is σ = 456648192. Its totient is φ = 31104000.

The previous prime is 138732743. The next prime is 138732787. The reversal of 138732750 is 57237831.

138732750 is a `hidden beast` number, since 1 + 387 + 3 + 275 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 4475235 + ... + 4475265.

Almost surely, 2^138732750 is an apocalyptic number.

138732750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 138732750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228324096).

138732750 is an abundant number, since it is smaller than the sum of its proper divisors (317915442).

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

138732750 is a wasteful number, since it uses less digits than its factorization.

138732750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 138732750 is about 11778.4867449091. The cubic root of 138732750 is about 517.6779476256.

The spelling of 138732750 in words is "one hundred thirty-eight million, seven hundred thirty-two thousand, seven hundred fifty".