90778238 has 8 divisors (see below), whose sum is σ = 143334120. Its totient is φ = 43000200.

The previous prime is 90778229. The next prime is 90778243. The reversal of 90778238 is 83287709.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194413 + ... + 1194488.

It is an arithmetic number, because the mean of its divisors is an integer number (17916765).

Almost surely, 2^90778238 is an apocalyptic number.

90778238 is a deficient number, since it is larger than the sum of its proper divisors (52555882).

90778238 is a wasteful number, since it uses less digits than its factorization.

90778238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388922.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 90778238 is about 9527.7614369798. The cubic root of 90778238 is about 449.4284727871.

The spelling of 90778238 in words is "ninety million, seven hundred seventy-eight thousand, two hundred thirty-eight".