61308630 has 192 divisors, whose sum is σ = 187634880. Its totient is φ = 14183424.

The previous prime is 61308619. The next prime is 61308631. The reversal of 61308630 is 3680316.

It is a super-2 number, since 2×61308630² = 7517496224953800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 61308594 and 61308603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61308631) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1656972 + ... + 1657008.

It is an arithmetic number, because the mean of its divisors is an integer number (977265).

Almost surely, 2^61308630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61308630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93817440).

61308630 is an abundant number, since it is smaller than the sum of its proper divisors (126326250).

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

61308630 is a wasteful number, since it uses less digits than its factorization.

61308630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 61308630 is about 7829.9827586017. The cubic root of 61308630 is about 394.3124931178.

Adding to 61308630 its reverse (3680316), we get a palindrome (64988946).

The spelling of 61308630 in words is "sixty-one million, three hundred eight thousand, six hundred thirty".