61027720 has 32 divisors (see below), whose sum is σ = 147876120. Its totient is φ = 22533120.

The previous prime is 61027709. The next prime is 61027727. The reversal of 61027720 is 2772016.

It can be written as a sum of positive squares in 4 ways, for example, as 33339076 + 27688644 = 5774^2 + 5262^2 .

It is not an unprimeable number, because it can be changed into a prime (61027727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58161 + ... + 59200.

Almost surely, 2^61027720 is an apocalyptic number.

It is an amenable number.

61027720 is an abundant number, since it is smaller than the sum of its proper divisors (86848400).

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

61027720 is a wasteful number, since it uses less digits than its factorization.

61027720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117385 (or 117381 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 61027720 is about 7812.0240655031. The cubic root of 61027720 is about 393.7093375327.

Adding to 61027720 its reverse (2772016), we get a palindrome (63799736).

The spelling of 61027720 in words is "sixty-one million, twenty-seven thousand, seven hundred twenty".