1987928446 has 8 divisors (see below), whose sum is σ = 3407877360. Its totient is φ = 851969328.

The previous prime is 1987928407. The next prime is 1987928461. The reversal of 1987928446 is 6448297891.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70997431 + ... + 70997458.

It is an arithmetic number, because the mean of its divisors is an integer number (425984670).

Almost surely, 2^1987928446 is an apocalyptic number.

1987928446 is a deficient number, since it is larger than the sum of its proper divisors (1419948914).

1987928446 is a wasteful number, since it uses less digits than its factorization.

1987928446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141994898.

The product of its digits is 6967296, while the sum is 58.

The square root of 1987928446 is about 44586.1912031068. The cubic root of 1987928446 is about 1257.3810652613.

The spelling of 1987928446 in words is "one billion, nine hundred eighty-seven million, nine hundred twenty-eight thousand, four hundred forty-six".