3895639272 has 160 divisors (see below), whose sum is σ = 12774928320. Its totient is φ = 1085840640.

The previous prime is 3895639271. The next prime is 3895639303. The reversal of 3895639272 is 2729365983.

It is a happy number.

3895639272 is a `hidden beast` number, since 3 + 8 + 9 + 563 + 9 + 2 + 72 = 666.

3895639272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (3895639271) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 175503 + ... + 196449.

It is an arithmetic number, because the mean of its divisors is an integer number (79843302).

Almost surely, 2^3895639272 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 3895639272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6387464160).

3895639272 is an abundant number, since it is smaller than the sum of its proper divisors (8879289048).

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

3895639272 is a wasteful number, since it uses less digits than its factorization.

3895639272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21013 (or 21000 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 3895639272 is about 62415.0564527502. The cubic root of 3895639272 is about 1573.4740267668.

The spelling of 3895639272 in words is "three billion, eight hundred ninety-five million, six hundred thirty-nine thousand, two hundred seventy-two".