3898672128 has 176 divisors, whose sum is σ = 12435279360. Its totient is φ = 1199480832.

The previous prime is 3898672123. The next prime is 3898672153. The reversal of 3898672128 is 8212768983.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (3898672123) 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, 354001 + ... + 364847.

Almost surely, 2^3898672128 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 3898672128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6217639680).

3898672128 is an abundant number, since it is smaller than the sum of its proper divisors (8536607232).

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

3898672128 is a wasteful number, since it uses less digits than its factorization.

3898672128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10889 (or 10865 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 3898672128 is about 62439.3475942854. The cubic root of 3898672128 is about 1573.8822509322.

The spelling of 3898672128 in words is "three billion, eight hundred ninety-eight million, six hundred seventy-two thousand, one hundred twenty-eight".