612317640 has 128 divisors (see below), whose sum is σ = 2011806720. Its totient is φ = 147859200.

The previous prime is 612317633. The next prime is 612317659. The reversal of 612317640 is 46713216.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 612317598 and 612317607.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 404485 + ... + 405995.

It is an arithmetic number, because the mean of its divisors is an integer number (15717240).

Almost surely, 2^612317640 is an apocalyptic number.

612317640 is a gapful number since it is divisible by the number (60) 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 612317640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1005903360).

612317640 is an abundant number, since it is smaller than the sum of its proper divisors (1399489080).

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

612317640 is a wasteful number, since it uses less digits than its factorization.

612317640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843 (or 1839 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 612317640 is about 24745.0528389010. The cubic root of 612317640 is about 849.1653352180.

It can be divided in two parts, 6123176 and 40, that added together give a palindrome (6123216).

The spelling of 612317640 in words is "six hundred twelve million, three hundred seventeen thousand, six hundred forty".