90755578 has 8 divisors (see below), whose sum is σ = 136598868. Its totient is φ = 45222624.

The previous prime is 90755573. The next prime is 90755593. The reversal of 90755578 is 87555709.

It can be written as a sum of positive squares in 2 ways, for example, as 84217329 + 6538249 = 9177^2 + 2557^2 .

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

It is a super-2 number, since 2×90755578² = 16473149876228168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90755573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76851 + ... + 78022.

Almost surely, 2^90755578 is an apocalyptic number.

90755578 is a deficient number, since it is larger than the sum of its proper divisors (45843290).

90755578 is a wasteful number, since it uses less digits than its factorization.

90755578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155168.

The product of its (nonzero) digits is 441000, while the sum is 46.

The square root of 90755578 is about 9526.5722062030. The cubic root of 90755578 is about 449.3910743352.

The spelling of 90755578 in words is "ninety million, seven hundred fifty-five thousand, five hundred seventy-eight".