138873400 has 24 divisors (see below), whose sum is σ = 322881120. Its totient is φ = 55549280.

The previous prime is 138873353. The next prime is 138873401. The reversal of 138873400 is 4378831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138873401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 346984 + ... + 347383.

It is an arithmetic number, because the mean of its divisors is an integer number (13453380).

Almost surely, 2^138873400 is an apocalyptic number.

138873400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138873400 is an abundant number, since it is smaller than the sum of its proper divisors (184007720).

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

138873400 is a wasteful number, since it uses less digits than its factorization.

138873400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694383 (or 694374 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 138873400 is about 11784.4558635518. The cubic root of 138873400 is about 517.8528325784.

The spelling of 138873400 in words is "one hundred thirty-eight million, eight hundred seventy-three thousand, four hundred".