220987984 has 40 divisors (see below), whose sum is σ = 499753728. Its totient is φ = 92691840.

The previous prime is 220987969. The next prime is 220987999. The reversal of 220987984 is 489789022.

It is an interprime number because it is at equal distance from previous prime (220987969) and next prime (220987999).

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 15727 + ... + 26254.

Almost surely, 2^220987984 is an apocalyptic number.

It is an amenable number.

220987984 is an abundant number, since it is smaller than the sum of its proper divisors (278765744).

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

220987984 is a wasteful number, since it uses less digits than its factorization.

220987984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42043 (or 42037 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 220987984 is about 14865.6646000103. The cubic root of 220987984 is about 604.5834019278.

The spelling of 220987984 in words is "two hundred twenty million, nine hundred eighty-seven thousand, nine hundred eighty-four".