29678890 has 24 divisors (see below), whose sum is σ = 55343340. Its totient is φ = 11458944.

The previous prime is 29678881. The next prime is 29678903. The reversal of 29678890 is 9887692.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 6859161 + 22819729 = 2619^2 + 4777^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 6646 + ... + 10174.

Almost surely, 2^29678890 is an apocalyptic number.

29678890 is a deficient number, since it is larger than the sum of its proper divisors (25664450).

29678890 is a wasteful number, since it uses less digits than its factorization.

29678890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594 (or 3565 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 29678890 is about 5447.8335143431. The cubic root of 29678890 is about 309.6106454174.

The spelling of 29678890 in words is "twenty-nine million, six hundred seventy-eight thousand, eight hundred ninety".