138051420 has 48 divisors (see below), whose sum is σ = 416280480. Its totient is φ = 33981696.

The previous prime is 138051409. The next prime is 138051421. The reversal of 138051420 is 24150831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138051421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87715 + ... + 89274.

It is an arithmetic number, because the mean of its divisors is an integer number (8672510).

Almost surely, 2^138051420 is an apocalyptic number.

138051420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138051420 is an abundant number, since it is smaller than the sum of its proper divisors (278229060).

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

138051420 is a wasteful number, since it uses less digits than its factorization.

138051420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177014 (or 177012 counting only the distinct ones).

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

The square root of 138051420 is about 11749.5285011782. The cubic root of 138051420 is about 516.8291009678.

It can be divided in two parts, 13805 and 1420, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 138051420 in words is "one hundred thirty-eight million, fifty-one thousand, four hundred twenty".