82404420 has 48 divisors (see below), whose sum is σ = 263695488. Its totient is φ = 18835200.

The previous prime is 82404401. The next prime is 82404431. The reversal of 82404420 is 2440428.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97681 + ... + 98520.

It is an arithmetic number, because the mean of its divisors is an integer number (5493656).

Almost surely, 2^82404420 is an apocalyptic number.

It is an amenable number.

82404420 is an abundant number, since it is smaller than the sum of its proper divisors (181291068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82404420 is a wasteful number, since it uses less digits than its factorization.

82404420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196220 (or 196218 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 82404420 is about 9077.6880316521. The cubic root of 82404420 is about 435.1612033002.

Adding to 82404420 its reverse (2440428), we get a palindrome (84844848).

The spelling of 82404420 in words is "eighty-two million, four hundred four thousand, four hundred twenty".