8420349 has 16 divisors (see below), whose sum is σ = 13179008. Its totient is φ = 4681152.

The previous prime is 8420327. The next prime is 8420351. The reversal of 8420349 is 9430248.

It is a happy number.

It is not a de Polignac number, because 8420349 - 2⁵ = 8420317 is a prime.

It is a Duffinian number.

8420349 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4642 + ... + 6195.

It is an arithmetic number, because the mean of its divisors is an integer number (823688).

Almost surely, 2^8420349 is an apocalyptic number.

It is an amenable number.

8420349 is a deficient number, since it is larger than the sum of its proper divisors (4758659).

8420349 is a wasteful number, since it uses less digits than its factorization.

8420349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10884.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 8420349 is about 2901.7837617576. The cubic root of 8420349 is about 203.4432870032.

The spelling of 8420349 in words is "eight million, four hundred twenty thousand, three hundred forty-nine".