138428316 has 36 divisors (see below), whose sum is σ = 376833912. Its totient is φ = 42593184.

The previous prime is 138428249. The next prime is 138428317. The reversal of 138428316 is 613824831.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138428317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147426 + ... + 148361.

Almost surely, 2^138428316 is an apocalyptic number.

It is an amenable number.

138428316 is an abundant number, since it is smaller than the sum of its proper divisors (238405596).

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

138428316 is a wasteful number, since it uses less digits than its factorization.

138428316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295810 (or 295805 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 138428316 is about 11765.5563404371. The cubic root of 138428316 is about 517.2990075727.

The spelling of 138428316 in words is "one hundred thirty-eight million, four hundred twenty-eight thousand, three hundred sixteen".