3780278749 has 8 divisors (see below), whose sum is σ = 4071600512. Its totient is φ = 3489032880.

The previous prime is 3780278717. The next prime is 3780278807. The reversal of 3780278749 is 9478720873.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3780278749 - 2⁵ = 3780278717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3780278749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3780278549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124984 + ... + 152254.

It is an arithmetic number, because the mean of its divisors is an integer number (508950064).

Almost surely, 2^3780278749 is an apocalyptic number.

It is an amenable number.

3780278749 is a deficient number, since it is larger than the sum of its proper divisors (291321763).

3780278749 is a wasteful number, since it uses less digits than its factorization.

3780278749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37947.

The product of its (nonzero) digits is 4741632, while the sum is 55.

The square root of 3780278749 is about 61483.9714803785. The cubic root of 3780278749 is about 1557.7865206866.

The spelling of 3780278749 in words is "three billion, seven hundred eighty million, two hundred seventy-eight thousand, seven hundred forty-nine".