61043730 has 64 divisors (see below), whose sum is σ = 161336448. Its totient is φ = 14658560.

The previous prime is 61043699. The next prime is 61043779. The reversal of 61043730 is 3734016.

It is a self number, because there is not a number n which added to its sum of digits gives 61043730.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36472 + ... + 38108.

It is an arithmetic number, because the mean of its divisors is an integer number (2520882).

Almost surely, 2^61043730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61043730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80668224).

61043730 is an abundant number, since it is smaller than the sum of its proper divisors (100292718).

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

61043730 is a wasteful number, since it uses less digits than its factorization.

61043730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 61043730 is about 7813.0487007314. The cubic root of 61043730 is about 393.7437630657.

Adding to 61043730 its reverse (3734016), we get a palindrome (64777746).

The spelling of 61043730 in words is "sixty-one million, forty-three thousand, seven hundred thirty".