138532450 has 48 divisors (see below), whose sum is σ = 307301760. Its totient is φ = 45429120.

The previous prime is 138532447. The next prime is 138532469. The reversal of 138532450 is 54235831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 555 + ... + 16654.

It is an arithmetic number, because the mean of its divisors is an integer number (6402120).

Almost surely, 2^138532450 is an apocalyptic number.

138532450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138532450 is an abundant number, since it is smaller than the sum of its proper divisors (168769310).

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

138532450 is a wasteful number, since it uses less digits than its factorization.

138532450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17251 (or 17246 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 138532450 is about 11769.9808835869. The cubic root of 138532450 is about 517.4286894046.

The spelling of 138532450 in words is "one hundred thirty-eight million, five hundred thirty-two thousand, four hundred fifty".