90378115 has 4 divisors (see below), whose sum is σ = 108453744. Its totient is φ = 72302488.

The previous prime is 90378107. The next prime is 90378157. The reversal of 90378115 is 51187309.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90378115 - 2³ = 90378107 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9037807 + ... + 9037816.

It is an arithmetic number, because the mean of its divisors is an integer number (27113436).

Almost surely, 2^90378115 is an apocalyptic number.

90378115 is a deficient number, since it is larger than the sum of its proper divisors (18075629).

90378115 is a wasteful number, since it uses less digits than its factorization.

90378115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18075628.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 90378115 is about 9506.7405034533. The cubic root of 90378115 is about 448.7671853507.

The spelling of 90378115 in words is "ninety million, three hundred seventy-eight thousand, one hundred fifteen".