138470838 has 32 divisors (see below), whose sum is σ = 302804352. Its totient is φ = 41865600.

The previous prime is 138470819. The next prime is 138470851. The reversal of 138470838 is 838074831.

It is a self number, because there is not a number n which added to its sum of digits gives 138470838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30270 + ... + 34542.

It is an arithmetic number, because the mean of its divisors is an integer number (9462636).

Almost surely, 2^138470838 is an apocalyptic number.

138470838 is an abundant number, since it is smaller than the sum of its proper divisors (164333514).

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

138470838 is a wasteful number, since it uses less digits than its factorization.

138470838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4780.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 138470838 is about 11767.3632560570. The cubic root of 138470838 is about 517.3519696090.

The spelling of 138470838 in words is "one hundred thirty-eight million, four hundred seventy thousand, eight hundred thirty-eight".