1989393046 has 8 divisors (see below), whose sum is σ = 2985762960. Its totient is φ = 994138728.

The previous prime is 1989392983. The next prime is 1989393067. The reversal of 1989393046 is 6403939891.

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

It is a junction number, because it is equal to n+sod(n) for n = 1989392984 and 1989393002.

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, 274426 + ... + 281581.

It is an arithmetic number, because the mean of its divisors is an integer number (373220370).

Almost surely, 2^1989393046 is an apocalyptic number.

1989393046 is a deficient number, since it is larger than the sum of its proper divisors (996369914).

1989393046 is a wasteful number, since it uses less digits than its factorization.

1989393046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557798.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 1989393046 is about 44602.6125468004. The cubic root of 1989393046 is about 1257.6897799675.

The spelling of 1989393046 in words is "one billion, nine hundred eighty-nine million, three hundred ninety-three thousand, forty-six".