612138385 has 16 divisors (see below), whose sum is σ = 743702400. Its totient is φ = 483641856.

The previous prime is 612138377. The next prime is 612138391. The reversal of 612138385 is 583831216.

It is a cyclic number.

It is not a de Polignac number, because 612138385 - 2³ = 612138377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299196 + ... + 301234.

It is an arithmetic number, because the mean of its divisors is an integer number (46481400).

Almost surely, 2^612138385 is an apocalyptic number.

It is an amenable number.

612138385 is a deficient number, since it is larger than the sum of its proper divisors (131564015).

612138385 is a wasteful number, since it uses less digits than its factorization.

612138385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760.

The product of its digits is 34560, while the sum is 37.

The square root of 612138385 is about 24741.4305366525. The cubic root of 612138385 is about 849.0824632038.

The spelling of 612138385 in words is "six hundred twelve million, one hundred thirty-eight thousand, three hundred eighty-five".