61726280 has 128 divisors (see below), whose sum is σ = 177120000. Its totient is φ = 19192320.

The previous prime is 61726271. The next prime is 61726289. The reversal of 61726280 is 8262716.

It is an interprime number because it is at equal distance from previous prime (61726271) and next prime (61726289).

It is not an unprimeable number, because it can be changed into a prime (61726289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150716 + ... + 151124.

It is an arithmetic number, because the mean of its divisors is an integer number (1383750).

Almost surely, 2^61726280 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 61726280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88560000).

61726280 is an abundant number, since it is smaller than the sum of its proper divisors (115393720).

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

61726280 is a wasteful number, since it uses less digits than its factorization.

61726280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 61726280 is about 7856.6074103267. The cubic root of 61726280 is about 395.2058532847.

Adding to 61726280 its reverse (8262716), we get a palindrome (69988996).

The spelling of 61726280 in words is "sixty-one million, seven hundred twenty-six thousand, two hundred eighty".