61028220 has 48 divisors (see below), whose sum is σ = 186415488. Its totient is φ = 14794560.

The previous prime is 61028203. The next prime is 61028239. The reversal of 61028220 is 2282016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45574 + ... + 46893.

It is an arithmetic number, because the mean of its divisors is an integer number (3883656).

Almost surely, 2^61028220 is an apocalyptic number.

61028220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61028220 is an abundant number, since it is smaller than the sum of its proper divisors (125387268).

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

61028220 is a wasteful number, since it uses less digits than its factorization.

61028220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92490 (or 92488 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 61028220 is about 7812.0560673871. The cubic root of 61028220 is about 393.7104127497.

The spelling of 61028220 in words is "sixty-one million, twenty-eight thousand, two hundred twenty".