612756138 has 32 divisors (see below), whose sum is σ = 1286717760. Its totient is φ = 194261760.

The previous prime is 612756127. The next prime is 612756197. The reversal of 612756138 is 831657216.

It is a junction number, because it is equal to n+sod(n) for n = 612756096 and 612756105.

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, 14623 + ... + 37938.

It is an arithmetic number, because the mean of its divisors is an integer number (40209930).

Almost surely, 2^612756138 is an apocalyptic number.

612756138 is an abundant number, since it is smaller than the sum of its proper divisors (673961622).

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

612756138 is a wasteful number, since it uses less digits than its factorization.

612756138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52662.

The product of its digits is 60480, while the sum is 39.

The square root of 612756138 is about 24753.9115696893. The cubic root of 612756138 is about 849.3679906302.

The spelling of 612756138 in words is "six hundred twelve million, seven hundred fifty-six thousand, one hundred thirty-eight".