90078530 has 8 divisors (see below), whose sum is σ = 162141372. Its totient is φ = 36031408.

The previous prime is 90078509. The next prime is 90078539. The reversal of 90078530 is 3587009.

It can be written as a sum of positive squares in 2 ways, for example, as 87740689 + 2337841 = 9367^2 + 1529^2 .

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

It is a super-2 number, since 2×90078530² = 16228283133921800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90078539) 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, 4503917 + ... + 4503936.

Almost surely, 2^90078530 is an apocalyptic number.

90078530 is a deficient number, since it is larger than the sum of its proper divisors (72062842).

90078530 is a wasteful number, since it uses less digits than its factorization.

90078530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9007860.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 90078530 is about 9490.9709724559. The cubic root of 90078530 is about 448.2707792507.

The spelling of 90078530 in words is "ninety million, seventy-eight thousand, five hundred thirty".