1671820942 has 48 divisors (see below), whose sum is σ = 2867533200. Its totient is φ = 729590400.

The previous prime is 1671820939. The next prime is 1671820949. The reversal of 1671820942 is 2490281761.

It is a junction number, because it is equal to n+sod(n) for n = 1671820895 and 1671820904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671820949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1480234 + ... + 1481362.

It is an arithmetic number, because the mean of its divisors is an integer number (59740275).

Almost surely, 2^1671820942 is an apocalyptic number.

1671820942 is a deficient number, since it is larger than the sum of its proper divisors (1195712258).

1671820942 is a wasteful number, since it uses less digits than its factorization.

1671820942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393 (or 1382 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 1671820942 is about 40887.9070386343. The cubic root of 1671820942 is about 1186.8520575598.

The spelling of 1671820942 in words is "one billion, six hundred seventy-one million, eight hundred twenty thousand, nine hundred forty-two".