29978146 has 8 divisors (see below), whose sum is σ = 49055184. Its totient is φ = 13626420.

The previous prime is 29978129. The next prime is 29978159. The reversal of 29978146 is 64187992.

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

It is a junction number, because it is equal to n+sod(n) for n = 29978096 and 29978105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681300 + ... + 681343.

It is an arithmetic number, because the mean of its divisors is an integer number (6131898).

Almost surely, 2^29978146 is an apocalyptic number.

29978146 is a deficient number, since it is larger than the sum of its proper divisors (19077038).

29978146 is a wasteful number, since it uses less digits than its factorization.

29978146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362656.

The product of its digits is 217728, while the sum is 46.

The square root of 29978146 is about 5475.2302234701. The cubic root of 29978146 is about 310.6477817567.

The spelling of 29978146 in words is "twenty-nine million, nine hundred seventy-eight thousand, one hundred forty-six".