84620890 has 8 divisors (see below), whose sum is σ = 152317620. Its totient is φ = 33848352.

The previous prime is 84620881. The next prime is 84620897. The reversal of 84620890 is 9802648.

It can be written as a sum of positive squares in 2 ways, for example, as 77422401 + 7198489 = 8799^2 + 2683^2 .

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

It is not an unprimeable number, because it can be changed into a prime (84620897) by changing a digit.

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, 4231035 + ... + 4231054.

Almost surely, 2^84620890 is an apocalyptic number.

84620890 is a deficient number, since it is larger than the sum of its proper divisors (67696730).

84620890 is a wasteful number, since it uses less digits than its factorization.

84620890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8462096.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 84620890 is about 9198.9613544139. The cubic root of 84620890 is about 439.0283137181.

It can be divided in two parts, 846 and 20890, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 84620890 in words is "eighty-four million, six hundred twenty thousand, eight hundred ninety".