612881938 has 8 divisors (see below), whose sum is σ = 928425420. Its totient is φ = 303406800.

The previous prime is 612881933. The next prime is 612881953. The reversal of 612881938 is 839188216.

It can be written as a sum of positive squares in 2 ways, for example, as 411156729 + 201725209 = 20277^2 + 14203^2 .

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 (612881933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1516833 + ... + 1517236.

Almost surely, 2^612881938 is an apocalyptic number.

612881938 is a deficient number, since it is larger than the sum of its proper divisors (315543482).

612881938 is a wasteful number, since it uses less digits than its factorization.

612881938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3034172.

The product of its digits is 165888, while the sum is 46.

The square root of 612881938 is about 24756.4524518357. The cubic root of 612881938 is about 849.4261122740.

The spelling of 612881938 in words is "six hundred twelve million, eight hundred eighty-one thousand, nine hundred thirty-eight".