3780644280 has 512 divisors, whose sum is σ = 14452162560. Its totient is φ = 771563520.

The previous prime is 3780644267. The next prime is 3780644321. The reversal of 3780644280 is 824460873.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 28859815 + ... + 28859945.

It is an arithmetic number, because the mean of its divisors is an integer number (28226880).

Almost surely, 2^3780644280 is an apocalyptic number.

3780644280 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 3780644280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7226081280).

3780644280 is an abundant number, since it is smaller than the sum of its proper divisors (10671518280).

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

3780644280 is a wasteful number, since it uses less digits than its factorization.

3780644280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

The square root of 3780644280 is about 61486.9439800028. The cubic root of 3780644280 is about 1557.8367287048.

The spelling of 3780644280 in words is "three billion, seven hundred eighty million, six hundred forty-four thousand, two hundred eighty".