1500423138 has 12 divisors (see below), whose sum is σ = 3250916838. Its totient is φ = 500141040.

The previous prime is 1500423131. The next prime is 1500423151. The reversal of 1500423138 is 8313240051.

It is a happy number.

1500423138 is a `hidden beast` number, since 1 + 500 + 4 + 23 + 138 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1363603329 + 136819809 = 36927^2 + 11697^2 .

It is not an unprimeable number, because it can be changed into a prime (1500423131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41678403 + ... + 41678438.

Almost surely, 2^1500423138 is an apocalyptic number.

1500423138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1500423138 is an abundant number, since it is smaller than the sum of its proper divisors (1750493700).

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

1500423138 is a wasteful number, since it uses less digits than its factorization.

1500423138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83356849 (or 83356846 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1500423138 is about 38735.2957649738. The cubic root of 1500423138 is about 1144.8218706770.

Adding to 1500423138 its reverse (8313240051), we get a palindrome (9813663189).

The spelling of 1500423138 in words is "one billion, five hundred million, four hundred twenty-three thousand, one hundred thirty-eight".