3778280756 has 24 divisors (see below), whose sum is σ = 6697596360. Its totient is φ = 1864783872.

The previous prime is 3778280731. The next prime is 3778280767. The reversal of 3778280756 is 6570828773.

It can be written as a sum of positive squares in 4 ways, for example, as 211600 + 3778069156 = 460^2 + 61466^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3778280698 and 3778280707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138416 + ... + 163448.

It is an arithmetic number, because the mean of its divisors is an integer number (279066515).

Almost surely, 2^3778280756 is an apocalyptic number.

It is an amenable number.

3778280756 is a deficient number, since it is larger than the sum of its proper divisors (2919315604).

3778280756 is a wasteful number, since it uses less digits than its factorization.

3778280756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25523 (or 25521 counting only the distinct ones).

The product of its (nonzero) digits is 3951360, while the sum is 53.

The square root of 3778280756 is about 61467.7212527030. The cubic root of 3778280756 is about 1557.5120263726.

The spelling of 3778280756 in words is "three billion, seven hundred seventy-eight million, two hundred eighty thousand, seven hundred fifty-six".