1988434546 has 32 divisors (see below), whose sum is σ = 3686072832. Its totient is φ = 784988160.

The previous prime is 1988434543. The next prime is 1988434601. The reversal of 1988434546 is 6454348891.

It is a super-2 number, since 2×1988434546² = 7907743887452452232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1988434493 and 1988434502.

It is not an unprimeable number, because it can be changed into a prime (1988434541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77695 + ... + 100066.

It is an arithmetic number, because the mean of its divisors is an integer number (115189776).

Almost surely, 2^1988434546 is an apocalyptic number.

1988434546 is a deficient number, since it is larger than the sum of its proper divisors (1697638286).

1988434546 is a wasteful number, since it uses less digits than its factorization.

1988434546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177834.

The product of its digits is 3317760, while the sum is 52.

The square root of 1988434546 is about 44591.8663659641. The cubic root of 1988434546 is about 1257.4877603426.

The spelling of 1988434546 in words is "one billion, nine hundred eighty-eight million, four hundred thirty-four thousand, five hundred forty-six".