29139516 has 54 divisors (see below), whose sum is σ = 85689240. Its totient is φ = 8325072.

The previous prime is 29139511. The next prime is 29139541. The reversal of 29139516 is 61593192.

29139516 is a `hidden beast` number, since 2 + 9 + 139 + 516 = 666.

It is a super-2 number, since 2×29139516² = 1698222785428512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29139511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6496 + ... + 10023.

Almost surely, 2^29139516 is an apocalyptic number.

It is an amenable number.

29139516 is an abundant number, since it is smaller than the sum of its proper divisors (56549724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29139516 is a wasteful number, since it uses less digits than its factorization.

29139516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16543 (or 16531 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 29139516 is about 5398.1030001288. The cubic root of 29139516 is about 307.7235811995.

The spelling of 29139516 in words is "twenty-nine million, one hundred thirty-nine thousand, five hundred sixteen".