29981700 has 108 divisors (see below), whose sum is σ = 107423680. Its totient is φ = 6851520.

The previous prime is 29981671. The next prime is 29981711. The reversal of 29981700 is 718992.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3921 + ... + 8679.

Almost surely, 2^29981700 is an apocalyptic number.

29981700 is a gapful number since it is divisible by the number (20) 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 29981700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53711840).

29981700 is an abundant number, since it is smaller than the sum of its proper divisors (77441980).

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

29981700 is a wasteful number, since it uses less digits than its factorization.

29981700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4786 (or 4776 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 29981700 is about 5475.5547664141. The cubic root of 29981700 is about 310.6600573501.

The spelling of 29981700 in words is "twenty-nine million, nine hundred eighty-one thousand, seven hundred".