61305630 has 32 divisors (see below), whose sum is σ = 149913504. Its totient is φ = 16039296.

The previous prime is 61305617. The next prime is 61305637. The reversal of 61305630 is 3650316.

It is a self number, because there is not a number n which added to its sum of digits gives 61305630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61305637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17689 + ... + 20868.

It is an arithmetic number, because the mean of its divisors is an integer number (4684797).

Almost surely, 2^61305630 is an apocalyptic number.

61305630 is an abundant number, since it is smaller than the sum of its proper divisors (88607874).

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

61305630 is a wasteful number, since it uses less digits than its factorization.

61305630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38620.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 61305630 is about 7829.7911849551. The cubic root of 61305630 is about 394.3060614143.

Adding to 61305630 its reverse (3650316), we get a palindrome (64955946).

The spelling of 61305630 in words is "sixty-one million, three hundred five thousand, six hundred thirty".