220087400 has 48 divisors (see below), whose sum is σ = 551071500. Its totient is φ = 81262080.

The previous prime is 220087339. The next prime is 220087403. The reversal of 220087400 is 4780022.

It can be written as a sum of positive squares in 6 ways, for example, as 14394436 + 205692964 = 3794^2 + 14342^2 .

It is not an unprimeable number, because it can be changed into a prime (220087403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39725 + ... + 44924.

Almost surely, 2^220087400 is an apocalyptic number.

220087400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220087400 is an abundant number, since it is smaller than the sum of its proper divisors (330984100).

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

220087400 is a wasteful number, since it uses less digits than its factorization.

220087400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84678 (or 84669 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 220087400 is about 14835.3429350319. The cubic root of 220087400 is about 603.7610051047.

The spelling of 220087400 in words is "two hundred twenty million, eighty-seven thousand, four hundred".