1990141445 has 8 divisors (see below), whose sum is σ = 2438982144. Its totient is φ = 1558238224.

The previous prime is 1990141429. The next prime is 1990141451. The reversal of 1990141445 is 5441410991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1990141445 - 2⁴ = 1990141429 is a prime.

It is a super-2 number, since 2×1990141445² = 7921325942213376050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1990141399 and 1990141408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4234109 + ... + 4234578.

It is an arithmetic number, because the mean of its divisors is an integer number (304872768).

Almost surely, 2^1990141445 is an apocalyptic number.

It is an amenable number.

1990141445 is a deficient number, since it is larger than the sum of its proper divisors (448840699).

1990141445 is an equidigital number, since it uses as much as digits as its factorization.

1990141445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8468739.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 1990141445 is about 44611.0013897917. The cubic root of 1990141445 is about 1257.8474722460.

The spelling of 1990141445 in words is "one billion, nine hundred ninety million, one hundred forty-one thousand, four hundred forty-five".