29939868 has 120 divisors (see below), whose sum is σ = 91828352. Its totient is φ = 8328096.

The previous prime is 29939857. The next prime is 29939891. The reversal of 29939868 is 86893992.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 97371 + ... + 97677.

Almost surely, 2^29939868 is an apocalyptic number.

29939868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29939868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45914176).

29939868 is an abundant number, since it is smaller than the sum of its proper divisors (61888484).

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

29939868 is a wasteful number, since it uses less digits than its factorization.

29939868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 362 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 29939868 is about 5471.7335461442. The cubic root of 29939868 is about 310.5155071720.

The spelling of 29939868 in words is "twenty-nine million, nine hundred thirty-nine thousand, eight hundred sixty-eight".