1890574449 has 4 divisors (see below), whose sum is σ = 2520765936. Its totient is φ = 1260382964.

The previous prime is 1890574397. The next prime is 1890574453. The reversal of 1890574449 is 9444750981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1890574449 - 2¹¹ = 1890572401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1890574849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315095739 + ... + 315095744.

It is an arithmetic number, because the mean of its divisors is an integer number (630191484).

Almost surely, 2^1890574449 is an apocalyptic number.

It is an amenable number.

1890574449 is a deficient number, since it is larger than the sum of its proper divisors (630191487).

1890574449 is an equidigital number, since it uses as much as digits as its factorization.

1890574449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630191486.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 1890574449 is about 43480.7365278004. The cubic root of 1890574449 is about 1236.5108401226.

The spelling of 1890574449 in words is "one billion, eight hundred ninety million, five hundred seventy-four thousand, four hundred forty-nine".