61301730 has 64 divisors (see below), whose sum is σ = 168956928. Its totient is φ = 13944000.

The previous prime is 61301719. The next prime is 61301731. The reversal of 61301730 is 3710316.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 61301697 and 61301706.

It is not an unprimeable number, because it can be changed into a prime (61301731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52129 + ... + 53291.

It is an arithmetic number, because the mean of its divisors is an integer number (2639952).

Almost surely, 2^61301730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61301730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84478464).

61301730 is an abundant number, since it is smaller than the sum of its proper divisors (107655198).

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

61301730 is a wasteful number, since it uses less digits than its factorization.

61301730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431.

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 61301730 is about 7829.5421322067. The cubic root of 61301730 is about 394.2976998862.

The spelling of 61301730 in words is "sixty-one million, three hundred one thousand, seven hundred thirty".