29920945 has 8 divisors (see below), whose sum is σ = 36241344. Its totient is φ = 23712624.

The previous prime is 29920883. The next prime is 29920949. The reversal of 29920945 is 54902992.

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

It is a cyclic number.

It is not a de Polignac number, because 29920945 - 2²³ = 21532337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 29920898 and 29920907.

It is not an unprimeable number, because it can be changed into a prime (29920949) 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, 27429 + ... + 28498.

It is an arithmetic number, because the mean of its divisors is an integer number (4530168).

Almost surely, 2^29920945 is an apocalyptic number.

It is an amenable number.

29920945 is a deficient number, since it is larger than the sum of its proper divisors (6320399).

29920945 is a wasteful number, since it uses less digits than its factorization.

29920945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56039.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 29920945 is about 5470.0041133440. The cubic root of 29920945 is about 310.4500746491.

The spelling of 29920945 in words is "twenty-nine million, nine hundred twenty thousand, nine hundred forty-five".