28485620 has 24 divisors (see below), whose sum is σ = 60021864. Its totient is φ = 11355776.

The previous prime is 28485601. The next prime is 28485629. The reversal of 28485620 is 2658482.

It can be written as a sum of positive squares in 4 ways, for example, as 4553956 + 23931664 = 2134^2 + 4892^2 .

It is a super-2 number, since 2×28485620² = 1622861093568800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28485629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4094 + ... + 8586.

It is an arithmetic number, because the mean of its divisors is an integer number (2500911).

Almost surely, 2^28485620 is an apocalyptic number.

28485620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28485620 is an abundant number, since it is smaller than the sum of its proper divisors (31536244).

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

28485620 is a wasteful number, since it uses less digits than its factorization.

28485620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4819 (or 4817 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 28485620 is about 5337.1921456886. The cubic root of 28485620 is about 305.4043548465.

The spelling of 28485620 in words is "twenty-eight million, four hundred eighty-five thousand, six hundred twenty".