2021243028 has 96 divisors (see below), whose sum is σ = 5856829440. Its totient is φ = 529441920.

The previous prime is 2021243017. The next prime is 2021243039. The reversal of 2021243028 is 8203421202.

It is an interprime number because it is at equal distance from previous prime (2021243017) and next prime (2021243039).

It is a junction number, because it is equal to n+sod(n) for n = 2021242989 and 2021243007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29050 + ... + 69902.

It is an arithmetic number, because the mean of its divisors is an integer number (61008640).

Almost surely, 2^2021243028 is an apocalyptic number.

2021243028 is a gapful number since it is divisible by the number (28) 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 2021243028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2928414720).

2021243028 is an abundant number, since it is smaller than the sum of its proper divisors (3835586412).

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

2021243028 is a wasteful number, since it uses less digits than its factorization.

2021243028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40917 (or 40915 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 2021243028 is about 44958.2364867662. The cubic root of 2021243028 is about 1264.3661054621.

The spelling of 2021243028 in words is "two billion, twenty-one million, two hundred forty-three thousand, twenty-eight".