1890563938 has 4 divisors (see below), whose sum is σ = 2835845910. Its totient is φ = 945281968.

The previous prime is 1890563933. The next prime is 1890563953. The reversal of 1890563938 is 8393650981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1872898729 + 17665209 = 43277^2 + 4203^2 .

It is not an unprimeable number, because it can be changed into a prime (1890563933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472640983 + ... + 472640986.

Almost surely, 2^1890563938 is an apocalyptic number.

1890563938 is a deficient number, since it is larger than the sum of its proper divisors (945281972).

1890563938 is an equidigital number, since it uses as much as digits as its factorization.

1890563938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945281971.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The square root of 1890563938 is about 43480.6156580148. The cubic root of 1890563938 is about 1236.5085485811.

The spelling of 1890563938 in words is "one billion, eight hundred ninety million, five hundred sixty-three thousand, nine hundred thirty-eight".