3781408 has 12 divisors (see below), whose sum is σ = 7444710. Its totient is φ = 1890688.

The previous prime is 3781403. The next prime is 3781423. The reversal of 3781408 is 8041873.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3055504 + 725904 = 1748^2 + 852^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3781408.

It is not an unprimeable number, because it can be changed into a prime (3781403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59053 + ... + 59116.

Almost surely, 2^3781408 is an apocalyptic number.

It is an amenable number.

3781408 is a deficient number, since it is larger than the sum of its proper divisors (3663302).

3781408 is a wasteful number, since it uses less digits than its factorization.

3781408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118179 (or 118171 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 3781408 is about 1944.5842743373. The cubic root of 3781408 is about 155.7941620083.

The spelling of 3781408 in words is "three million, seven hundred eighty-one thousand, four hundred eight".