29904861 has 8 divisors (see below), whose sum is σ = 45569344. Its totient is φ = 17088480.

The previous prime is 29904839. The next prime is 29904907. The reversal of 29904861 is 16840992.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 29904861 - 2⁷ = 29904733 is a prime.

It is a super-2 number, since 2×29904861² = 1788601422858642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29904661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712000 + ... + 712041.

It is an arithmetic number, because the mean of its divisors is an integer number (5696168).

Almost surely, 2^29904861 is an apocalyptic number.

29904861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

29904861 is a deficient number, since it is larger than the sum of its proper divisors (15664483).

29904861 is a wasteful number, since it uses less digits than its factorization.

29904861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424051.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 29904861 is about 5468.5337157231. The cubic root of 29904861 is about 310.3944372132.

The spelling of 29904861 in words is "twenty-nine million, nine hundred four thousand, eight hundred sixty-one".