1990301842452 has 72 divisors (see below), whose sum is σ = 5893361318880. Its totient is φ = 516961515840.

The previous prime is 1990301842391. The next prime is 1990301842453. The reversal of 1990301842452 is 2542481030991.

It is a happy number.

It is a super-2 number, since 2×1990301842452² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990301842453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153851127 + ... + 153864062.

It is an arithmetic number, because the mean of its divisors is an integer number (81852240540).

Almost surely, 2^{1990301842452} is an apocalyptic number.

1990301842452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1990301842452 is an abundant number, since it is smaller than the sum of its proper divisors (3903059476428).

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

1990301842452 is a wasteful number, since it uses less digits than its factorization.

1990301842452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307715221 (or 307715212 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 1990301842452 in words is "one trillion, nine hundred ninety billion, three hundred one million, eight hundred forty-two thousand, four hundred fifty-two".