138451700 has 36 divisors (see below), whose sum is σ = 305378892. Its totient is φ = 54470400.

The previous prime is 138451699. The next prime is 138451759. The reversal of 138451700 is 7154831.

It can be written as a sum of positive squares in 6 ways, for example, as 73068304 + 65383396 = 8548^2 + 8086^2 .

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 5249 + ... + 17448.

It is an arithmetic number, because the mean of its divisors is an integer number (8482747).

Almost surely, 2^138451700 is an apocalyptic number.

138451700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138451700 is an abundant number, since it is smaller than the sum of its proper divisors (166927192).

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

138451700 is a wasteful number, since it uses less digits than its factorization.

138451700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22772 (or 22765 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 138451700 is about 11766.5500466364. The cubic root of 138451700 is about 517.3281341735.

The spelling of 138451700 in words is "one hundred thirty-eight million, four hundred fifty-one thousand, seven hundred".