3781357020 has 288 divisors, whose sum is σ = 13930914816. Its totient is φ = 842918400.

The previous prime is 3781357001. The next prime is 3781357031. The reversal of 3781357020 is 207531873.

3781357020 is a `hidden beast` number, since 3 + 7 + 81 + 3 + 570 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 1393465 + ... + 1396175.

It is an arithmetic number, because the mean of its divisors is an integer number (48371232).

Almost surely, 2^3781357020 is an apocalyptic number.

3781357020 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 3781357020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6965457408).

3781357020 is an abundant number, since it is smaller than the sum of its proper divisors (10149557796).

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

3781357020 is a wasteful number, since it uses less digits than its factorization.

3781357020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783 (or 2769 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 3781357020 is about 61492.7395714323. The cubic root of 3781357020 is about 1557.9346187909.

Adding to 3781357020 its reverse (207531873), we get a palindrome (3988888893).

The spelling of 3781357020 in words is "three billion, seven hundred eighty-one million, three hundred fifty-seven thousand, twenty".