1977195328 has 56 divisors (see below), whose sum is σ = 4152107520. Its totient is φ = 931553280.

The previous prime is 1977195323. The next prime is 1977195349. The reversal of 1977195328 is 8235917791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1977195323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228000 + ... + 236512.

Almost surely, 2^1977195328 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 1977195328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2076053760).

1977195328 is an abundant number, since it is smaller than the sum of its proper divisors (2174912192).

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

1977195328 is a wasteful number, since it uses less digits than its factorization.

1977195328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8735 (or 8725 counting only the distinct ones).

The product of its digits is 952560, while the sum is 52.

The square root of 1977195328 is about 44465.6645964052. The cubic root of 1977195328 is about 1255.1140519513.

The spelling of 1977195328 in words is "one billion, nine hundred seventy-seven million, one hundred ninety-five thousand, three hundred twenty-eight".