29991026 has 16 divisors (see below), whose sum is σ = 51297624. Its totient is φ = 13027584.

The previous prime is 29991019. The next prime is 29991037. The reversal of 29991026 is 62019992.

It can be written as a sum of positive squares in 4 ways, for example, as 27573001 + 2418025 = 5251^2 + 1555^2 .

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 33485 + ... + 34368.

Almost surely, 2^29991026 is an apocalyptic number.

29991026 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

29991026 is a deficient number, since it is larger than the sum of its proper divisors (21306598).

29991026 is a wasteful number, since it uses less digits than its factorization.

29991026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67885.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 29991026 is about 5476.4063034074. The cubic root of 29991026 is about 310.6922649450.

The spelling of 29991026 in words is "twenty-nine million, nine hundred ninety-one thousand, twenty-six".