29878723479 has 48 divisors (see below), whose sum is σ = 45711206240. Its totient is φ = 17329593600.

The previous prime is 29878723471. The next prime is 29878723493. The reversal of 29878723479 is 97432787892.

It is not a de Polignac number, because 29878723479 - 2³ = 29878723471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29878723471) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 801057 + ... + 837525.

Almost surely, 2^29878723479 is an apocalyptic number.

29878723479 is a deficient number, since it is larger than the sum of its proper divisors (15832482761).

29878723479 is a wasteful number, since it uses less digits than its factorization.

29878723479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36592 (or 36581 counting only the distinct ones).

The product of its digits is 85349376, while the sum is 66.

It can be divided in two parts, 29878 and 723479, that added together give a palindrome (753357).

The spelling of 29878723479 in words is "twenty-nine billion, eight hundred seventy-eight million, seven hundred twenty-three thousand, four hundred seventy-nine".