3780401787 has 24 divisors (see below), whose sum is σ = 5697625024. Its totient is φ = 2504779848.

The previous prime is 3780401767. The next prime is 3780401791. The reversal of 3780401787 is 7871040873.

It is a happy number.

It is not a de Polignac number, because 3780401787 - 2⁷ = 3780401659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3780401767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8113 + ... + 87330.

Almost surely, 2^3780401787 is an apocalyptic number.

3780401787 is a deficient number, since it is larger than the sum of its proper divisors (1917223237).

3780401787 is an equidigital number, since it uses as much as digits as its factorization.

3780401787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95621 (or 95609 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The square root of 3780401787 is about 61484.9720419551. The cubic root of 3780401787 is about 1557.8034211033.

The spelling of 3780401787 in words is "three billion, seven hundred eighty million, four hundred one thousand, seven hundred eighty-seven".