90213806 has 8 divisors (see below), whose sum is σ = 136660824. Its totient is φ = 44660200.

The previous prime is 90213803. The next prime is 90213811. The reversal of 90213806 is 60831209.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90213803) 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, 223100 + ... + 223503.

It is an arithmetic number, because the mean of its divisors is an integer number (17082603).

Almost surely, 2^90213806 is an apocalyptic number.

90213806 is a deficient number, since it is larger than the sum of its proper divisors (46447018).

90213806 is a wasteful number, since it uses less digits than its factorization.

90213806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446706.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 90213806 is about 9498.0948616025. The cubic root of 90213806 is about 448.4950648364.

It can be divided in two parts, 90213 and 806, that added together give a palindrome (91019).

The spelling of 90213806 in words is "ninety million, two hundred thirteen thousand, eight hundred six".