90878486 has 4 divisors (see below), whose sum is σ = 136317732. Its totient is φ = 45439242.

The previous prime is 90878477. The next prime is 90878507. The reversal of 90878486 is 68487809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68487809 = 13 ⋅5268293.

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 as a sum of consecutive naturals, namely, 22719620 + ... + 22719623.

It is an arithmetic number, because the mean of its divisors is an integer number (34079433).

Almost surely, 2^90878486 is an apocalyptic number.

90878486 is a deficient number, since it is larger than the sum of its proper divisors (45439246).

90878486 is a wasteful number, since it uses less digits than its factorization.

90878486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45439245.

The product of its (nonzero) digits is 774144, while the sum is 50.

The square root of 90878486 is about 9533.0208223836. The cubic root of 90878486 is about 449.5938491737.

The spelling of 90878486 in words is "ninety million, eight hundred seventy-eight thousand, four hundred eighty-six".