61028240 has 160 divisors (see below), whose sum is σ = 178488576. Its totient is φ = 18892800.

The previous prime is 61028239. The next prime is 61028251. The reversal of 61028240 is 4282016.

61028240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 604190 + ... + 604290.

Almost surely, 2^61028240 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 61028240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89244288).

61028240 is an abundant number, since it is smaller than the sum of its proper divisors (117460336).

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

61028240 is a wasteful number, since it uses less digits than its factorization.

61028240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 61028240 is about 7812.0573474598. The cubic root of 61028240 is about 393.7104557583.

The spelling of 61028240 in words is "sixty-one million, twenty-eight thousand, two hundred forty".