1990549435 has 8 divisors (see below), whose sum is σ = 2729896416. Its totient is φ = 1364948160.

The previous prime is 1990549433. The next prime is 1990549441. The reversal of 1990549435 is 5349450991.

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

It is not a de Polignac number, because 1990549435 - 2¹ = 1990549433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990549433) 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, 28436386 + ... + 28436455.

It is an arithmetic number, because the mean of its divisors is an integer number (341237052).

Almost surely, 2^1990549435 is an apocalyptic number.

1990549435 is a deficient number, since it is larger than the sum of its proper divisors (739346981).

1990549435 is an equidigital number, since it uses as much as digits as its factorization.

1990549435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56872853.

The product of its (nonzero) digits is 874800, while the sum is 49.

The square root of 1990549435 is about 44615.5739064287. The cubic root of 1990549435 is about 1257.9334216018.

The spelling of 1990549435 in words is "one billion, nine hundred ninety million, five hundred forty-nine thousand, four hundred thirty-five".