2028740421390 has 32 divisors (see below), whose sum is σ = 4869427332096. Its totient is φ = 540947410080.

The previous prime is 2028740421377. The next prime is 2028740421397. The reversal of 2028740421390 is 931240478202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2028740421397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2796882 + ... + 3446741.

It is an arithmetic number, because the mean of its divisors is an integer number (152169604128).

Almost surely, 2^{2028740421390} is an apocalyptic number.

2028740421390 is an abundant number, since it is smaller than the sum of its proper divisors (2840686910706).

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

2028740421390 is a wasteful number, since it uses less digits than its factorization.

2028740421390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6254464.

The product of its (nonzero) digits is 193536, while the sum is 42.

Adding to 2028740421390 its reverse (931240478202), we get a palindrome (2959980899592).

The spelling of 2028740421390 in words is "two trillion, twenty-eight billion, seven hundred forty million, four hundred twenty-one thousand, three hundred ninety".