612531398 has 8 divisors (see below), whose sum is σ = 930427680. Its totient is φ = 302388840.

The previous prime is 612531397. The next prime is 612531433. The reversal of 612531398 is 893135216.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612531391) 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, 1938233 + ... + 1938548.

It is an arithmetic number, because the mean of its divisors is an integer number (116303460).

Almost surely, 2^612531398 is an apocalyptic number.

612531398 is a deficient number, since it is larger than the sum of its proper divisors (317896282).

612531398 is a wasteful number, since it uses less digits than its factorization.

612531398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876862.

The product of its digits is 38880, while the sum is 38.

The square root of 612531398 is about 24749.3716687919. The cubic root of 612531398 is about 849.2641372959.

The spelling of 612531398 in words is "six hundred twelve million, five hundred thirty-one thousand, three hundred ninety-eight".