90007144 has 16 divisors (see below), whose sum is σ = 171948420. Its totient is φ = 44154240.

The previous prime is 90007121. The next prime is 90007153. The reversal of 90007144 is 44170009.

It can be written as a sum of positive squares in 2 ways, for example, as 75030244 + 14976900 = 8662^2 + 3870^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105717 + ... + 106564.

Almost surely, 2^90007144 is an apocalyptic number.

It is an amenable number.

90007144 is a deficient number, since it is larger than the sum of its proper divisors (81941276).

90007144 is a wasteful number, since it uses less digits than its factorization.

90007144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212340 (or 212336 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 90007144 is about 9487.2094948936. The cubic root of 90007144 is about 448.1523318070.

The spelling of 90007144 in words is "ninety million, seven thousand, one hundred forty-four".