28898220 has 48 divisors (see below), whose sum is σ = 87141600. Its totient is φ = 7113216.

The previous prime is 28898209. The next prime is 28898237. The reversal of 28898220 is 2289882.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 17745 + ... + 19304.

It is an arithmetic number, because the mean of its divisors is an integer number (1815450).

Almost surely, 2^28898220 is an apocalyptic number.

28898220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28898220 is an abundant number, since it is smaller than the sum of its proper divisors (58243380).

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

28898220 is a wasteful number, since it uses less digits than its factorization.

28898220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37074 (or 37072 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 28898220 is about 5375.7064652006. The cubic root of 28898220 is about 306.8718355054.

The spelling of 28898220 in words is "twenty-eight million, eight hundred ninety-eight thousand, two hundred twenty".