1927490985 has 40 divisors (see below), whose sum is σ = 3948812736. Its totient is φ = 881137440.

The previous prime is 1927490959. The next prime is 1927491029. The reversal of 1927490985 is 5890947291.

It is not a de Polignac number, because 1927490985 - 2¹² = 1927486889 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 337111 + ... + 342780.

Almost surely, 2^1927490985 is an apocalyptic number.

1927490985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1927490985 is an abundant number, since it is smaller than the sum of its proper divisors (2021321751).

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

1927490985 is an equidigital number, since it uses as much as digits as its factorization.

1927490985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679915 (or 679906 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The square root of 1927490985 is about 43903.2001680971. The cubic root of 1927490985 is about 1244.5073097686.

The spelling of 1927490985 in words is "one billion, nine hundred twenty-seven million, four hundred ninety thousand, nine hundred eighty-five".