820654490 has 16 divisors (see below), whose sum is σ = 1541403648. Its totient is φ = 313989456.

The previous prime is 820654469. The next prime is 820654501. The reversal of 820654490 is 94456028.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1783802 + ... + 1784261.

It is an arithmetic number, because the mean of its divisors is an integer number (96337728).

Almost surely, 2^820654490 is an apocalyptic number.

820654490 is a deficient number, since it is larger than the sum of its proper divisors (720749158).

820654490 is a wasteful number, since it uses less digits than its factorization.

820654490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568093.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 820654490 is about 28647.0677382520. The cubic root of 820654490 is about 936.2391189363.

The spelling of 820654490 in words is "eight hundred twenty million, six hundred fifty-four thousand, four hundred ninety".