61298720 has 96 divisors (see below), whose sum is σ = 166924800. Its totient is φ = 20837376.

The previous prime is 61298711. The next prime is 61298759. The reversal of 61298720 is 2789216.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256361 + ... + 256599.

It is an arithmetic number, because the mean of its divisors is an integer number (1738800).

Almost surely, 2^61298720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61298720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83462400).

61298720 is an abundant number, since it is smaller than the sum of its proper divisors (105626080).

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

61298720 is a wasteful number, since it uses less digits than its factorization.

61298720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 61298720 is about 7829.3499091559. The cubic root of 61298720 is about 394.2912462592.

The spelling of 61298720 in words is "sixty-one million, two hundred ninety-eight thousand, seven hundred twenty".