890220385 has 8 divisors (see below), whose sum is σ = 1131103656. Its totient is φ = 670283520.

The previous prime is 890220361. The next prime is 890220431. The reversal of 890220385 is 583022098.

It can be written as a sum of positive squares in 4 ways, for example, as 22505536 + 867714849 = 4744^2 + 29457^2 .

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

It is not a de Polignac number, because 890220385 - 2⁷ = 890220257 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5236506 + ... + 5236675.

It is an arithmetic number, because the mean of its divisors is an integer number (141387957).

Almost surely, 2^890220385 is an apocalyptic number.

890220385 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

890220385 is a deficient number, since it is larger than the sum of its proper divisors (240883271).

890220385 is a wasteful number, since it uses less digits than its factorization.

890220385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10473203.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 890220385 is about 29836.5612127135. The cubic root of 890220385 is about 961.9795614481.

The spelling of 890220385 in words is "eight hundred ninety million, two hundred twenty thousand, three hundred eighty-five".