90190078 has 16 divisors (see below), whose sum is σ = 151184880. Its totient is φ = 39995200.

The previous prime is 90190069. The next prime is 90190099. The reversal of 90190078 is 87009109.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 49093 + ... + 50896.

It is an arithmetic number, because the mean of its divisors is an integer number (9449055).

Almost surely, 2^90190078 is an apocalyptic number.

90190078 is a deficient number, since it is larger than the sum of its proper divisors (60994802).

90190078 is a wasteful number, since it uses less digits than its factorization.

90190078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100043.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 90190078 is about 9496.8456868583. The cubic root of 90190078 is about 448.4557403896.

The spelling of 90190078 in words is "ninety million, one hundred ninety thousand, seventy-eight".