218073880 has 16 divisors (see below), whose sum is σ = 490666320. Its totient is φ = 87229536.

The previous prime is 218073839. The next prime is 218073883. The reversal of 218073880 is 88370812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218073883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2725884 + ... + 2725963.

It is an arithmetic number, because the mean of its divisors is an integer number (30666645).

Almost surely, 2^218073880 is an apocalyptic number.

218073880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218073880 is an abundant number, since it is smaller than the sum of its proper divisors (272592440).

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

218073880 is a wasteful number, since it uses less digits than its factorization.

218073880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5451858 (or 5451854 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 218073880 is about 14767.3247407917. The cubic root of 218073880 is about 601.9141461728.

The spelling of 218073880 in words is "two hundred eighteen million, seventy-three thousand, eight hundred eighty".