90444409 has 8 divisors (see below), whose sum is σ = 99541152. Its totient is φ = 81493440.

The previous prime is 90444407. The next prime is 90444451.

It is a happy number.

90444409 is nontrivially palindromic in base 10.

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 90444409 - 2¹ = 90444407 is a prime.

It is a super-2 number, since 2×90444409² = 16360382238718562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90444407) 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, 35139 + ... + 37624.

It is an arithmetic number, because the mean of its divisors is an integer number (12442644).

Almost surely, 2^90444409 is an apocalyptic number.

It is an amenable number.

90444409 is a deficient number, since it is larger than the sum of its proper divisors (9096743).

90444409 is a wasteful number, since it uses less digits than its factorization.

90444409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72887.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 90444409 is about 9510.2265483005. The cubic root of 90444409 is about 448.8768848450.

The spelling of 90444409 in words is "ninety million, four hundred forty-four thousand, four hundred nine".