612218740 has 72 divisors (see below), whose sum is σ = 1507645440. Its totient is φ = 208208448.

The previous prime is 612218723. The next prime is 612218743. The reversal of 612218740 is 47812216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612218743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122001 + ... + 126919.

It is an arithmetic number, because the mean of its divisors is an integer number (20939520).

Almost surely, 2^612218740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612218740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753822720).

612218740 is an abundant number, since it is smaller than the sum of its proper divisors (895426700).

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

612218740 is a wasteful number, since it uses less digits than its factorization.

612218740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5069 (or 5060 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 612218740 is about 24743.0543789565. The cubic root of 612218740 is about 849.1196144090.

The spelling of 612218740 in words is "six hundred twelve million, two hundred eighteen thousand, seven hundred forty".