220977936 has 40 divisors (see below), whose sum is σ = 634289760. Its totient is φ = 73659168.

The previous prime is 220977919. The next prime is 220977947. The reversal of 220977936 is 639779022.

It is a happy number.

220977936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 220977891 and 220977900.

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, 255330 + ... + 256193.

It is an arithmetic number, because the mean of its divisors is an integer number (15857244).

Almost surely, 2^220977936 is an apocalyptic number.

It is an amenable number.

220977936 is an abundant number, since it is smaller than the sum of its proper divisors (413311824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220977936 is a wasteful number, since it uses less digits than its factorization.

220977936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511540 (or 511528 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 220977936 is about 14865.3266361691. The cubic root of 220977936 is about 604.5742386150.

The spelling of 220977936 in words is "two hundred twenty million, nine hundred seventy-seven thousand, nine hundred thirty-six".