82405401 has 16 divisors (see below), whose sum is σ = 121525824. Its totient is φ = 49339584.

The previous prime is 82405399. The next prime is 82405439. The reversal of 82405401 is 10450428.

It is not a de Polignac number, because 82405401 - 2¹ = 82405399 is a prime.

It is a super-2 number, since 2×82405401² = 13581300227941602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82405441) 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, 27111 + ... + 29996.

It is an arithmetic number, because the mean of its divisors is an integer number (7595364).

Almost surely, 2^82405401 is an apocalyptic number.

It is an amenable number.

82405401 is a deficient number, since it is larger than the sum of its proper divisors (39120423).

82405401 is a wasteful number, since it uses less digits than its factorization.

82405401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57160.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 82405401 is about 9077.7420650732. The cubic root of 82405401 is about 435.1629301147.

Adding to 82405401 its reverse (10450428), we get a palindrome (92855829).

The spelling of 82405401 in words is "eighty-two million, four hundred five thousand, four hundred one".