29981012390 has 64 divisors (see below), whose sum is σ = 62287999488. Its totient is φ = 10177440000.

The previous prime is 29981012363. The next prime is 29981012419. The reversal of 29981012390 is 9321018992.

It is a happy number.

It is a super-2 number, since 2×29981012390² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4278890 + ... + 4285890.

It is an arithmetic number, because the mean of its divisors is an integer number (973249992).

Almost surely, 2^29981012390 is an apocalyptic number.

29981012390 is an abundant number, since it is smaller than the sum of its proper divisors (32306987098).

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

29981012390 is a wasteful number, since it uses less digits than its factorization.

29981012390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7613.

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 29981012390 in words is "twenty-nine billion, nine hundred eighty-one million, twelve thousand, three hundred ninety".