90702405 has 12 divisors (see below), whose sum is σ = 157217580. Its totient is φ = 48374592.

The previous prime is 90702397. The next prime is 90702419. The reversal of 90702405 is 50420709.

It can be written as a sum of positive squares in 2 ways, for example, as 50936769 + 39765636 = 7137^2 + 6306^2 .

It is not a de Polignac number, because 90702405 - 2³ = 90702397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1007760 + ... + 1007849.

It is an arithmetic number, because the mean of its divisors is an integer number (13101465).

Almost surely, 2^90702405 is an apocalyptic number.

It is an amenable number.

90702405 is a deficient number, since it is larger than the sum of its proper divisors (66515175).

90702405 is a wasteful number, since it uses less digits than its factorization.

90702405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015620 (or 2015617 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 90702405 is about 9523.7810243621. The cubic root of 90702405 is about 449.3032922567.

The spelling of 90702405 in words is "ninety million, seven hundred two thousand, four hundred five".