57729069 has 6 divisors (see below), whose sum is σ = 83386446. Its totient is φ = 38486040.

The previous prime is 57729047. The next prime is 57729071. The reversal of 57729069 is 96092775.

It can be written as a sum of positive squares in only one way, i.e., 41447844 + 16281225 = 6438^2 + 4035^2 .

It is not a de Polignac number, because 57729069 - 2¹² = 57724973 is a prime.

It is a super-2 number, since 2×57729069² = 6665290815213522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57729029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3207162 + ... + 3207179.

It is an arithmetic number, because the mean of its divisors is an integer number (13897741).

Almost surely, 2^57729069 is an apocalyptic number.

It is an amenable number.

57729069 is a deficient number, since it is larger than the sum of its proper divisors (25657377).

57729069 is a wasteful number, since it uses less digits than its factorization.

57729069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6414347 (or 6414344 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 57729069 is about 7597.9647932851. The cubic root of 57729069 is about 386.4839987194.

It can be divided in two parts, 5772 and 9069, that added together give a palindrome (14841).

The spelling of 57729069 in words is "fifty-seven million, seven hundred twenty-nine thousand, sixty-nine".