1671859428 has 12 divisors (see below), whose sum is σ = 3901005360. Its totient is φ = 557286472.

The previous prime is 1671859327. The next prime is 1671859429. The reversal of 1671859428 is 8249581761.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1671859428² = 5590227893984974368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1671859429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69660798 + ... + 69660821.

It is an arithmetic number, because the mean of its divisors is an integer number (325083780).

Almost surely, 2^1671859428 is an apocalyptic number.

It is an amenable number.

1671859428 is an abundant number, since it is smaller than the sum of its proper divisors (2229145932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1671859428 is a wasteful number, since it uses less digits than its factorization.

1671859428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139321626 (or 139321624 counting only the distinct ones).

The product of its digits is 967680, while the sum is 51.

The square root of 1671859428 is about 40888.3776640747. The cubic root of 1671859428 is about 1186.8611647627.

The spelling of 1671859428 in words is "one billion, six hundred seventy-one million, eight hundred fifty-nine thousand, four hundred twenty-eight".