212082780 has 288 divisors, whose sum is σ = 772208640. Its totient is φ = 43061760.

The previous prime is 212082743. The next prime is 212082809. The reversal of 212082780 is 87280212.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1184731 + ... + 1184909.

It is an arithmetic number, because the mean of its divisors is an integer number (2681280).

Almost surely, 2^212082780 is an apocalyptic number.

212082780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212082780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386104320).

212082780 is an abundant number, since it is smaller than the sum of its proper divisors (560125860).

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

212082780 is a wasteful number, since it uses less digits than its factorization.

212082780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 212082780 is about 14563.0621779899. The cubic root of 212082780 is about 596.3507949442.

The spelling of 212082780 in words is "two hundred twelve million, eighty-two thousand, seven hundred eighty".