29987982 has 40 divisors (see below), whose sum is σ = 69025176. Its totient is φ = 9723888.

The previous prime is 29987981. The next prime is 29987987. The reversal of 29987982 is 28978992.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29987981) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3493 + ... + 8495.

Almost surely, 2^29987982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29987982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34512588).

29987982 is an abundant number, since it is smaller than the sum of its proper divisors (39037194).

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

29987982 is a wasteful number, since it uses less digits than its factorization.

29987982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5054 (or 5045 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 29987982 is about 5476.1283768736. The cubic root of 29987982 is about 310.6817531422.

The spelling of 29987982 in words is "twenty-nine million, nine hundred eighty-seven thousand, nine hundred eighty-two".