2028740421420 has 72 divisors (see below), whose sum is σ = 6157481746416. Its totient is φ = 540677814912.

The previous prime is 2028740421419. The next prime is 2028740421451. The reversal of 2028740421420 is 241240478202.

2028740421420 is a `hidden beast` number, since 202 + 8 + 7 + 4 + 0 + 4 + 21 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3023902 + ... + 3633381.

Almost surely, 2^{2028740421420} is an apocalyptic number.

2028740421420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2028740421420 is an abundant number, since it is smaller than the sum of its proper divisors (4128741324996).

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

2028740421420 is a wasteful number, since it uses less digits than its factorization.

2028740421420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6658991 (or 6658986 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 36.

Adding to 2028740421420 its reverse (241240478202), we get a palindrome (2269980899622).

The spelling of 2028740421420 in words is "two trillion, twenty-eight billion, seven hundred forty million, four hundred twenty-one thousand, four hundred twenty".