1990057422 has 16 divisors (see below), whose sum is σ = 3984643152. Its totient is φ = 662597760.

The previous prime is 1990057411. The next prime is 1990057423. The reversal of 1990057422 is 2247500991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990057423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182953 + ... + 193524.

It is an arithmetic number, because the mean of its divisors is an integer number (249040197).

Almost surely, 2^1990057422 is an apocalyptic number.

1990057422 is an abundant number, since it is smaller than the sum of its proper divisors (1994585730).

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

1990057422 is a wasteful number, since it uses less digits than its factorization.

1990057422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377363.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1990057422 is about 44610.0596502627. The cubic root of 1990057422 is about 1257.8297700527.

The spelling of 1990057422 in words is "one billion, nine hundred ninety million, fifty-seven thousand, four hundred twenty-two".