61030940 has 48 divisors (see below), whose sum is σ = 133297920. Its totient is φ = 23447040.

The previous prime is 61030939. The next prime is 61030973. The reversal of 61030940 is 4903016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106976 + ... + 107544.

It is an arithmetic number, because the mean of its divisors is an integer number (2777040).

Almost surely, 2^61030940 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 61030940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66648960).

61030940 is an abundant number, since it is smaller than the sum of its proper divisors (72266980).

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

61030940 is a wasteful number, since it uses less digits than its factorization.

61030940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 61030940 is about 7812.2301553398. The cubic root of 61030940 is about 393.7162618275.

Adding to 61030940 its reverse (4903016), we get a palindrome (65933956).

The spelling of 61030940 in words is "sixty-one million, thirty thousand, nine hundred forty".