90447405 has 16 divisors (see below), whose sum is σ = 145161024. Its totient is φ = 48090240.

The previous prime is 90447403. The next prime is 90447449. The reversal of 90447405 is 50474409.

It is a happy number.

It is not a de Polignac number, because 90447405 - 2¹ = 90447403 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90447403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4144 + ... + 14073.

It is an arithmetic number, because the mean of its divisors is an integer number (9072564).

Almost surely, 2^90447405 is an apocalyptic number.

It is an amenable number.

90447405 is a deficient number, since it is larger than the sum of its proper divisors (54713619).

90447405 is a wasteful number, since it uses less digits than its factorization.

90447405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18556.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 90447405 is about 9510.3840616455. The cubic root of 90447405 is about 448.8818411871.

The spelling of 90447405 in words is "ninety million, four hundred forty-seven thousand, four hundred five".