8420379 has 32 divisors (see below), whose sum is σ = 12856320. Its totient is φ = 4857600.

The previous prime is 8420351. The next prime is 8420393. The reversal of 8420379 is 9730248.

It is not a de Polignac number, because 8420379 - 2⁸ = 8420123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (8490379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94567 + ... + 94655.

It is an arithmetic number, because the mean of its divisors is an integer number (401760).

Almost surely, 2^8420379 is an apocalyptic number.

8420379 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

8420379 is a deficient number, since it is larger than the sum of its proper divisors (4435941).

8420379 is a wasteful number, since it uses less digits than its factorization.

8420379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 8420379 is about 2901.7889309872. The cubic root of 8420379 is about 203.4435286120.

The spelling of 8420379 in words is "eight million, four hundred twenty thousand, three hundred seventy-nine".