3785402281 has 16 divisors (see below), whose sum is σ = 4126512640. Its totient is φ = 3459231360.

The previous prime is 3785402267. The next prime is 3785402297. The reversal of 3785402281 is 1822045873.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3785402281 - 2¹¹ = 3785400233 is a prime.

It is a super-2 number, since 2×3785402281² = 28658540858000005922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3785402251) 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, 174091 + ... + 194623.

It is an arithmetic number, because the mean of its divisors is an integer number (257907040).

Almost surely, 2^3785402281 is an apocalyptic number.

3785402281 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3785402281 is a deficient number, since it is larger than the sum of its proper divisors (341110359).

3785402281 is a wasteful number, since it uses less digits than its factorization.

3785402281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20896.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 3785402281 is about 61525.6229631200. The cubic root of 3785402281 is about 1558.4899755135.

The spelling of 3785402281 in words is "three billion, seven hundred eighty-five million, four hundred two thousand, two hundred eighty-one".