1985491046 has 16 divisors (see below), whose sum is σ = 3713126400. Its totient is φ = 773567880.

The previous prime is 1985491033. The next prime is 1985491049. The reversal of 1985491046 is 6401945891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985491049) 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, 6446246 + ... + 6446553.

It is an arithmetic number, because the mean of its divisors is an integer number (232070400).

Almost surely, 2^1985491046 is an apocalyptic number.

1985491046 is a deficient number, since it is larger than the sum of its proper divisors (1727635354).

1985491046 is a wasteful number, since it uses less digits than its factorization.

1985491046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12892819.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 1985491046 is about 44558.8492445664. The cubic root of 1985491046 is about 1256.8669632525.

The spelling of 1985491046 in words is "one billion, nine hundred eighty-five million, four hundred ninety-one thousand, forty-six".