612905712 has 80 divisors (see below), whose sum is σ = 1641418752. Its totient is φ = 196865280.

The previous prime is 612905669. The next prime is 612905717. The reversal of 612905712 is 217509216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612905717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411433 + ... + 412919.

Almost surely, 2^612905712 is an apocalyptic number.

612905712 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612905712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (820709376).

612905712 is an abundant number, since it is smaller than the sum of its proper divisors (1028513040).

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

612905712 is a wasteful number, since it uses less digits than its factorization.

612905712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806 (or 1800 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 612905712 is about 24756.9326048281. The cubic root of 612905712 is about 849.4370953546.

The spelling of 612905712 in words is "six hundred twelve million, nine hundred five thousand, seven hundred twelve".