28925020 has 12 divisors (see below), whose sum is σ = 60742584. Its totient is φ = 11570000.

The previous prime is 28924997. The next prime is 28925027. The reversal of 28925020 is 2052982.

It is a self number, because there is not a number n which added to its sum of digits gives 28925020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28925027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723106 + ... + 723145.

It is an arithmetic number, because the mean of its divisors is an integer number (5061882).

Almost surely, 2^28925020 is an apocalyptic number.

28925020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28925020 is an abundant number, since it is smaller than the sum of its proper divisors (31817564).

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

28925020 is a wasteful number, since it uses less digits than its factorization.

28925020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446260 (or 1446258 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 28925020 is about 5378.1985831689. The cubic root of 28925020 is about 306.9666697680.

The spelling of 28925020 in words is "twenty-eight million, nine hundred twenty-five thousand, twenty".