138501420 has 24 divisors (see below), whose sum is σ = 387804144. Its totient is φ = 36933696.

The previous prime is 138501373. The next prime is 138501437. The reversal of 138501420 is 24105831.

138501420 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

138501420 is strictly pandigital in base 9.

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 7 ways as a sum of consecutive naturals, for example, 1154119 + ... + 1154238.

It is an arithmetic number, because the mean of its divisors is an integer number (16158506).

Almost surely, 2^138501420 is an apocalyptic number.

138501420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138501420 is an abundant number, since it is smaller than the sum of its proper divisors (249302724).

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

138501420 is a wasteful number, since it uses less digits than its factorization.

138501420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308369 (or 2308367 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 138501420 is about 11768.6626258042. The cubic root of 138501420 is about 517.3900534240.

The spelling of 138501420 in words is "one hundred thirty-eight million, five hundred one thousand, four hundred twenty".