3778509812 has 24 divisors (see below), whose sum is σ = 8244022080. Its totient is φ = 1472146560.

The previous prime is 3778509809. The next prime is 3778509853. The reversal of 3778509812 is 2189058773.

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, 6133637 + ... + 6134252.

It is an arithmetic number, because the mean of its divisors is an integer number (343500920).

Almost surely, 2^3778509812 is an apocalyptic number.

It is an amenable number.

3778509812 is an abundant number, since it is smaller than the sum of its proper divisors (4465512268).

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

3778509812 is a wasteful number, since it uses less digits than its factorization.

3778509812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12267911 (or 12267909 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 3778509812 is about 61469.5844462934. The cubic root of 3778509812 is about 1557.5435001467.

The spelling of 3778509812 in words is "three billion, seven hundred seventy-eight million, five hundred nine thousand, eight hundred twelve".