61320300 has 72 divisors (see below), whose sum is σ = 185154816. Its totient is φ = 15639360.

The previous prime is 61320283. The next prime is 61320307. The reversal of 61320300 is 302316.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 61320300.

It is not an unprimeable number, because it can be changed into a prime (61320307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2457 + ... + 11343.

Almost surely, 2^61320300 is an apocalyptic number.

61320300 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61320300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92577408).

61320300 is an abundant number, since it is smaller than the sum of its proper divisors (123834516).

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

61320300 is a wasteful number, since it uses less digits than its factorization.

61320300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8927 (or 8920 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 61320300 is about 7830.7279355115. The cubic root of 61320300 is about 394.3375104487.

Adding to 61320300 its reverse (302316), we get a palindrome (61622616).

The spelling of 61320300 in words is "sixty-one million, three hundred twenty thousand, three hundred".