61028520 has 192 divisors, whose sum is σ = 217183680. Its totient is φ = 13676544.

The previous prime is 61028507. The next prime is 61028549. The reversal of 61028520 is 2582016.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 570307 + ... + 570413.

It is an arithmetic number, because the mean of its divisors is an integer number (1131165).

Almost surely, 2^61028520 is an apocalyptic number.

61028520 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 61028520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108591840).

61028520 is an abundant number, since it is smaller than the sum of its proper divisors (156155160).

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

61028520 is a wasteful number, since it uses less digits than its factorization.

61028520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 61028520 is about 7812.0752684546. The cubic root of 61028520 is about 393.7110578771.

The spelling of 61028520 in words is "sixty-one million, twenty-eight thousand, five hundred twenty".