3894277638 has 8 divisors (see below), whose sum is σ = 7788555288. Its totient is φ = 1298092544.

The previous prime is 3894277633. The next prime is 3894277687. The reversal of 3894277638 is 8367724983.

3894277638 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

3894277638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3894277633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324523131 + ... + 324523142.

It is an arithmetic number, because the mean of its divisors is an integer number (973569411).

Almost surely, 2^3894277638 is an apocalyptic number.

3894277638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3894277638 is a wasteful number, since it uses less digits than its factorization.

3894277638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649046278.

The product of its digits is 12192768, while the sum is 57.

The square root of 3894277638 is about 62404.1476025432. The cubic root of 3894277638 is about 1573.2906811289.

The spelling of 3894277638 in words is "three billion, eight hundred ninety-four million, two hundred seventy-seven thousand, six hundred thirty-eight".