29686428 has 36 divisors (see below), whose sum is σ = 75282480. Its totient is φ = 9863616.

The previous prime is 29686411. The next prime is 29686439. The reversal of 29686428 is 82468692.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11776 + ... + 14072.

It is an arithmetic number, because the mean of its divisors is an integer number (2091180).

Almost surely, 2^29686428 is an apocalyptic number.

It is an amenable number.

29686428 is an abundant number, since it is smaller than the sum of its proper divisors (45596052).

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

29686428 is a wasteful number, since it uses less digits than its factorization.

29686428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666 (or 2661 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 29686428 is about 5448.5253050711. The cubic root of 29686428 is about 309.6368553765.

The spelling of 29686428 in words is "twenty-nine million, six hundred eighty-six thousand, four hundred twenty-eight".