3780720738 has 32 divisors (see below), whose sum is σ = 8843793600. Its totient is φ = 1193911488.

The previous prime is 3780720733. The next prime is 3780720739. The reversal of 3780720738 is 8370270873.

It is a junction number, because it is equal to n+sod(n) for n = 3780720693 and 3780720702.

It is not an unprimeable number, because it can be changed into a prime (3780720731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1841431 + ... + 1843482.

It is an arithmetic number, because the mean of its divisors is an integer number (276368550).

Almost surely, 2^3780720738 is an apocalyptic number.

3780720738 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3780720738 is an abundant number, since it is smaller than the sum of its proper divisors (5063072862).

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

3780720738 is a wasteful number, since it uses less digits than its factorization.

3780720738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684943 (or 3684937 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 3780720738 is about 61487.5657186069. The cubic root of 3780720738 is about 1557.8472302903.

The spelling of 3780720738 in words is "three billion, seven hundred eighty million, seven hundred twenty thousand, seven hundred thirty-eight".