977644222 has 16 divisors (see below), whose sum is σ = 1479532032. Its totient is φ = 484475040.

The previous prime is 977644207. The next prime is 977644231. The reversal of 977644222 is 222446779.

It is a nialpdrome in base 10.

It is a congruent 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, 439072 + ... + 441292.

It is an arithmetic number, because the mean of its divisors is an integer number (92470752).

Almost surely, 2^977644222 is an apocalyptic number.

977644222 is a deficient number, since it is larger than the sum of its proper divisors (501887810).

977644222 is a wasteful number, since it uses less digits than its factorization.

977644222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4083.

The product of its digits is 338688, while the sum is 43.

The square root of 977644222 is about 31267.3027618309. The cubic root of 977644222 is about 992.4918426577.

The spelling of 977644222 in words is "nine hundred seventy-seven million, six hundred forty-four thousand, two hundred twenty-two".