1993897152 has 126 divisors (see below), whose sum is σ = 6188892372. Its totient is φ = 613476864.

The previous prime is 1993897151. The next prime is 1993897193. The reversal of 1993897152 is 2517983991.

1993897152 is a `hidden beast` number, since 199 + 389 + 71 + 5 + 2 = 666.

It is a super-2 number, since 2×1993897152² = 7951251705507422208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1993897151) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 87103 + ... + 107585.

Almost surely, 2^1993897152 is an apocalyptic number.

1993897152 is a gapful number since it is divisible by the number (12) 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 1993897152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3094446186).

1993897152 is an abundant number, since it is smaller than the sum of its proper divisors (4194995220).

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

1993897152 is a wasteful number, since it uses less digits than its factorization.

1993897152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20527 (or 20501 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 1993897152 is about 44653.0755043816. The cubic root of 1993897152 is about 1258.6382264194.

The spelling of 1993897152 in words is "one billion, nine hundred ninety-three million, eight hundred ninety-seven thousand, one hundred fifty-two".