612297840 has 320 divisors, whose sum is σ = 2506982400. Its totient is φ = 119685120.

The previous prime is 612297821. The next prime is 612297877. The reversal of 612297840 is 48792216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 313186 + ... + 315134.

It is an arithmetic number, because the mean of its divisors is an integer number (7834320).

Almost surely, 2^612297840 is an apocalyptic number.

612297840 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 612297840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1253491200).

612297840 is an abundant number, since it is smaller than the sum of its proper divisors (1894684560).

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

612297840 is a wasteful number, since it uses less digits than its factorization.

612297840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000 (or 1994 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 612297840 is about 24744.6527556965. The cubic root of 612297840 is about 849.1561822045.

The spelling of 612297840 in words is "six hundred twelve million, two hundred ninety-seven thousand, eight hundred forty".