90440545 has 8 divisors (see below), whose sum is σ = 116877096. Its totient is φ = 66786816.

The previous prime is 90440521. The next prime is 90440557. The reversal of 90440545 is 54504409.

It can be written as a sum of positive squares in 4 ways, for example, as 399424 + 90041121 = 632^2 + 9489^2 .

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 90440545 - 2⁹ = 90440033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 695632 + ... + 695761.

It is an arithmetic number, because the mean of its divisors is an integer number (14609637).

Almost surely, 2^90440545 is an apocalyptic number.

It is an amenable number.

90440545 is a deficient number, since it is larger than the sum of its proper divisors (26436551).

90440545 is a wasteful number, since it uses less digits than its factorization.

90440545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391411.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 90440545 is about 9510.0233963960. The cubic root of 90440545 is about 448.8704923917.

The spelling of 90440545 in words is "ninety million, four hundred forty thousand, five hundred forty-five".