3213778680 has 480 divisors, whose sum is σ = 12990637440. Its totient is φ = 709793280.

The previous prime is 3213778669. The next prime is 3213778681. The reversal of 3213778680 is 868773123.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213778681) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4921234 + ... + 4921886.

It is an arithmetic number, because the mean of its divisors is an integer number (27063828).

Almost surely, 2^3213778680 is an apocalyptic number.

3213778680 is a gapful number since it is divisible by the number (30) 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 3213778680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6495318720).

3213778680 is an abundant number, since it is smaller than the sum of its proper divisors (9776858760).

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

3213778680 is a wasteful number, since it uses less digits than its factorization.

3213778680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 3213778680 is about 56690.1991529400. The cubic root of 3213778680 is about 1475.7246164802.

The spelling of 3213778680 in words is "three billion, two hundred thirteen million, seven hundred seventy-eight thousand, six hundred eighty".