138434750 has 32 divisors (see below), whose sum is σ = 260874432. Its totient is φ = 55005600.

The previous prime is 138434749. The next prime is 138434761. The reversal of 138434750 is 57434831.

It is a self number, because there is not a number n which added to its sum of digits gives 138434750.

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 15 ways as a sum of consecutive naturals, for example, 37487 + ... + 41013.

It is an arithmetic number, because the mean of its divisors is an integer number (8152326).

Almost surely, 2^138434750 is an apocalyptic number.

138434750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138434750 is a deficient number, since it is larger than the sum of its proper divisors (122439682).

138434750 is a wasteful number, since it uses less digits than its factorization.

138434750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701 (or 3691 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 138434750 is about 11765.8297624944. The cubic root of 138434750 is about 517.3070219500.

The spelling of 138434750 in words is "one hundred thirty-eight million, four hundred thirty-four thousand, seven hundred fifty".