612611280 has 60 divisors (see below), whose sum is σ = 2057355300. Its totient is φ = 163362816.

The previous prime is 612611249. The next prime is 612611327. The reversal of 612611280 is 82116216.

It can be written as a sum of positive squares in 2 ways, for example, as 206669376 + 405941904 = 14376^2 + 20148^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 424705 + ... + 426144.

It is an arithmetic number, because the mean of its divisors is an integer number (34289255).

Almost surely, 2^612611280 is an apocalyptic number.

612611280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

612611280 is an abundant number, since it is smaller than the sum of its proper divisors (1444744020).

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

612611280 is a wasteful number, since it uses less digits than its factorization.

612611280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850868 (or 850859 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 612611280 is about 24750.9854349276. The cubic root of 612611280 is about 849.3010540261.

Adding to 612611280 its reverse (82116216), we get a palindrome (694727496).

The spelling of 612611280 in words is "six hundred twelve million, six hundred eleven thousand, two hundred eighty".