34320405 has 32 divisors (see below), whose sum is σ = 63019008. Its totient is φ = 15624000.

The previous prime is 34320401. The next prime is 34320413. The reversal of 34320405 is 50402343.

It is a happy number.

It is not a de Polignac number, because 34320405 - 2² = 34320401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34320401) 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, 32130 + ... + 33180.

It is an arithmetic number, because the mean of its divisors is an integer number (1969344).

Almost surely, 2^34320405 is an apocalyptic number.

34320405 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

34320405 is a deficient number, since it is larger than the sum of its proper divisors (28698603).

34320405 is a wasteful number, since it uses less digits than its factorization.

34320405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 34320405 is about 5858.3619724288. The cubic root of 34320405 is about 324.9756352543.

Adding to 34320405 its reverse (50402343), we get a palindrome (84722748).

The spelling of 34320405 in words is "thirty-four million, three hundred twenty thousand, four hundred five".