29981487690 has 192 divisors, whose sum is σ = 100434620160. Its totient is φ = 6229872000.

The previous prime is 29981487673. The next prime is 29981487719. The reversal of 29981487690 is 9678418992.

29981487690 is a `hidden beast` number, since 2 + 9 + 98 + 1 + 487 + 69 + 0 = 666.

It is a super-2 number, since 2×29981487690² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 163140 + ... + 294240.

It is an arithmetic number, because the mean of its divisors is an integer number (523096980).

Almost surely, 2^29981487690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29981487690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50217310080).

29981487690 is an abundant number, since it is smaller than the sum of its proper divisors (70453132470).

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

29981487690 is a wasteful number, since it uses less digits than its factorization.

29981487690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131146 (or 131129 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 63.

The spelling of 29981487690 in words is "twenty-nine billion, nine hundred eighty-one million, four hundred eighty-seven thousand, six hundred ninety".