84290405 has 8 divisors (see below), whose sum is σ = 103057272. Its totient is φ = 66159808.

The previous prime is 84290357. The next prime is 84290407. The reversal of 84290405 is 50409248.

It can be written as a sum of positive squares in 4 ways, for example, as 21548164 + 62742241 = 4642^2 + 7921^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84290405 - 2⁸ = 84290149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84290407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158774 + ... + 159303.

It is an arithmetic number, because the mean of its divisors is an integer number (12882159).

Almost surely, 2^84290405 is an apocalyptic number.

It is an amenable number.

84290405 is a deficient number, since it is larger than the sum of its proper divisors (18766867).

84290405 is a wasteful number, since it uses less digits than its factorization.

84290405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318135.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 84290405 is about 9180.9806121133. The cubic root of 84290405 is about 438.4560296243.

The spelling of 84290405 in words is "eighty-four million, two hundred ninety thousand, four hundred five".