29640769 has 4 divisors (see below), whose sum is σ = 29659696. Its totient is φ = 29621844.

The previous prime is 29640763. The next prime is 29640791. The reversal of 29640769 is 96704692.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29640769 - 2³ = 29640761 is a prime.

It is a super-2 number, since 2×29640769² = 1757150373822722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29640761) 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, 6879 + ... + 10324.

It is an arithmetic number, because the mean of its divisors is an integer number (7414924).

Almost surely, 2^29640769 is an apocalyptic number.

It is an amenable number.

29640769 is a deficient number, since it is larger than the sum of its proper divisors (18927).

29640769 is a wasteful number, since it uses less digits than its factorization.

29640769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18926.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 29640769 is about 5444.3336598706. Note that the first 3 decimals coincide. The cubic root of 29640769 is about 309.4780289984.

The spelling of 29640769 in words is "twenty-nine million, six hundred forty thousand, seven hundred sixty-nine".