220887970 has 16 divisors (see below), whose sum is σ = 420986808. Its totient is φ = 83157760.

The previous prime is 220887913. The next prime is 220887971. The reversal of 220887970 is 79788022.

It can be written as a sum of positive squares in 4 ways, for example, as 140588449 + 80299521 = 11857^2 + 8961^2 .

It is not an unprimeable number, because it can be changed into a prime (220887971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649501 + ... + 649840.

Almost surely, 2^220887970 is an apocalyptic number.

220887970 is a deficient number, since it is larger than the sum of its proper divisors (200098838).

220887970 is a wasteful number, since it uses less digits than its factorization.

220887970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299365.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 220887970 is about 14862.3002930233. The cubic root of 220887970 is about 604.4921813895.

The spelling of 220887970 in words is "two hundred twenty million, eight hundred eighty-seven thousand, nine hundred seventy".