61724260 has 24 divisors (see below), whose sum is σ = 139592376. Its totient is φ = 22790400.

The previous prime is 61724239. The next prime is 61724279. The reversal of 61724260 is 6242716.

It can be written as a sum of positive squares in 4 ways, for example, as 3873024 + 57851236 = 1968^2 + 7606^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118441 + ... + 118960.

It is an arithmetic number, because the mean of its divisors is an integer number (5816349).

Almost surely, 2^61724260 is an apocalyptic number.

It is an amenable number.

61724260 is an abundant number, since it is smaller than the sum of its proper divisors (77868116).

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

61724260 is a wasteful number, since it uses less digits than its factorization.

61724260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237423 (or 237421 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 61724260 is about 7856.4788550597. The cubic root of 61724260 is about 395.2015421845.

Adding to 61724260 its reverse (6242716), we get a palindrome (67966976).

The spelling of 61724260 in words is "sixty-one million, seven hundred twenty-four thousand, two hundred sixty".