220862640 has 80 divisors (see below), whose sum is σ = 724962528. Its totient is φ = 55431168.

The previous prime is 220862633. The next prime is 220862641. The reversal of 220862640 is 46268022.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 220862598 and 220862607.

It is not an unprimeable number, because it can be changed into a prime (220862641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22987 + ... + 31146.

Almost surely, 2^220862640 is an apocalyptic number.

220862640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220862640 is an abundant number, since it is smaller than the sum of its proper divisors (504099888).

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

220862640 is a wasteful number, since it uses less digits than its factorization.

220862640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54166 (or 54160 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 220862640 is about 14861.4481124822. The cubic root of 220862640 is about 604.4690740917.

The spelling of 220862640 in words is "two hundred twenty million, eight hundred sixty-two thousand, six hundred forty".