90440534 has 8 divisors (see below), whose sum is σ = 135993720. Its totient is φ = 45109296.

The previous prime is 90440521. The next prime is 90440557. The reversal of 90440534 is 43504409.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90440497 and 90440506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54464 + ... + 56099.

It is an arithmetic number, because the mean of its divisors is an integer number (16999215).

Almost surely, 2^90440534 is an apocalyptic number.

90440534 is a deficient number, since it is larger than the sum of its proper divisors (45553186).

90440534 is a wasteful number, since it uses less digits than its factorization.

90440534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110974.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 90440534 is about 9510.0228180589. The cubic root of 90440534 is about 448.8704741935.

The spelling of 90440534 in words is "ninety million, four hundred forty thousand, five hundred thirty-four".