88638984729 has 9 divisors (see below), whose sum is σ = 128035379199. Its totient is φ = 59092061040.

The previous prime is 88638984727. The next prime is 88638984757. The reversal of 88638984729 is 92748983688.

The square root of 88638984729 is 297723.

It is a perfect power (a square), and thus also a powerful number.

88638984729 is a `hidden beast` number, since 8 + 8 + 63 + 8 + 98 + 472 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 88581831129 + 57153600 = 297627^2 + 7560^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 88638984729 - 2¹ = 88638984727 is a prime.

It is a super-2 number, since 2×88638984729² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (88638984727) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 843549 + ... + 942789.

Almost surely, 2^88638984729 is an apocalyptic number.

88638984729 is the 297723-rd square number.

88638984729 is the 148862-nd centered octagonal number.

It is an amenable number.

88638984729 is a deficient number, since it is larger than the sum of its proper divisors (39396394470).

88638984729 is an frugal number, since it uses more digits than its factorization.

88638984729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198488 (or 99244 counting only the distinct ones).

The product of its digits is 334430208, while the sum is 72.

The spelling of 88638984729 in words is "eighty-eight billion, six hundred thirty-eight million, nine hundred eighty-four thousand, seven hundred twenty-nine".