3897688380 has 48 divisors (see below), whose sum is σ = 11145738240. Its totient is φ = 1017268288.

The previous prime is 3897688331. The next prime is 3897688387. The reversal of 3897688380 is 838867983.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3897688387) 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, 688260 + ... + 693899.

It is an arithmetic number, because the mean of its divisors is an integer number (232202880).

Almost surely, 2^3897688380 is an apocalyptic number.

3897688380 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3897688380 is an abundant number, since it is smaller than the sum of its proper divisors (7248049860).

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

3897688380 is a wasteful number, since it uses less digits than its factorization.

3897688380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382218 (or 1382216 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 60.

The square root of 3897688380 is about 62431.4694685301. The cubic root of 3897688380 is about 1573.7498610902.

The spelling of 3897688380 in words is "three billion, eight hundred ninety-seven million, six hundred eighty-eight thousand, three hundred eighty".