1938077568 has 192 divisors, whose sum is σ = 6420492000. Its totient is φ = 549679104.

The previous prime is 1938077567. The next prime is 1938077593. The reversal of 1938077568 is 8657708391.

1938077568 is a `hidden beast` number, since 1 + 9 + 3 + 8 + 0 + 77 + 568 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×1938077568² = 7512289319169589248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938077563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1200730 + ... + 1202342.

Almost surely, 2^1938077568 is an apocalyptic number.

1938077568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1938077568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3210246000).

1938077568 is an abundant number, since it is smaller than the sum of its proper divisors (4482414432).

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

1938077568 is a wasteful number, since it uses less digits than its factorization.

1938077568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The square root of 1938077568 is about 44023.6023968961. The cubic root of 1938077568 is about 1246.7816018156.

The spelling of 1938077568 in words is "one billion, nine hundred thirty-eight million, seventy-seven thousand, five hundred sixty-eight".