29681428 has 12 divisors (see below), whose sum is σ = 59362912. Its totient is φ = 12720600.

The previous prime is 29681419. The next prime is 29681453. The reversal of 29681428 is 82418692.

29681428 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529998 + ... + 530053.

Almost surely, 2^29681428 is an apocalyptic number.

29681428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

29681428 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

29681428 is a wasteful number, since it uses less digits than its factorization.

29681428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060062 (or 1060060 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 29681428 is about 5448.0664459971. The cubic root of 29681428 is about 309.6194706510.

The spelling of 29681428 in words is "twenty-nine million, six hundred eighty-one thousand, four hundred twenty-eight".