29280660431 has 4 divisors (see below), whose sum is σ = 31942538664. Its totient is φ = 26618782200.

The previous prime is 29280660421. The next prime is 29280660433. The reversal of 29280660431 is 13406608292.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29280660431 is a prime.

It is a super-2 number, since 2×29280660431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29280660433) 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, 1330939100 + ... + 1330939121.

It is an arithmetic number, because the mean of its divisors is an integer number (7985634666).

Almost surely, 2^29280660431 is an apocalyptic number.

29280660431 is a deficient number, since it is larger than the sum of its proper divisors (2661878233).

29280660431 is a wasteful number, since it uses less digits than its factorization.

29280660431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661878232.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 29280660431 in words is "twenty-nine billion, two hundred eighty million, six hundred sixty thousand, four hundred thirty-one".