1671392128 has 128 divisors (see below), whose sum is σ = 4056972480. Its totient is φ = 669548544.

The previous prime is 1671392123. The next prime is 1671392141. The reversal of 1671392128 is 8212931761.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671392123) 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, 3000426 + ... + 3000982.

Almost surely, 2^1671392128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1671392128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2028486240).

1671392128 is an abundant number, since it is smaller than the sum of its proper divisors (2385580352).

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

1671392128 is a wasteful number, since it uses less digits than its factorization.

1671392128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792 (or 780 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 1671392128 is about 40882.6629269670. The cubic root of 1671392128 is about 1186.7505749418.

The spelling of 1671392128 in words is "one billion, six hundred seventy-one million, three hundred ninety-two thousand, one hundred twenty-eight".