838142506 has 8 divisors (see below), whose sum is σ = 1257447204. Its totient is φ = 418993440.

The previous prime is 838142491. The next prime is 838142507. The reversal of 838142506 is 605241838.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 607376025 + 230766481 = 24645^2 + 15191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (838142507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24355 + ... + 47638.

Almost surely, 2^838142506 is an apocalyptic number.

838142506 is a deficient number, since it is larger than the sum of its proper divisors (419304698).

838142506 is a wasteful number, since it uses less digits than its factorization.

838142506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77816.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 838142506 is about 28950.6909416684. The cubic root of 838142506 is about 942.8427995960.

It can be divided in two parts, 83814 and 2506, that added together give a triangular number (86320 = T₄₁₅).

The spelling of 838142506 in words is "eight hundred thirty-eight million, one hundred forty-two thousand, five hundred six".