3684940781 has 8 divisors (see below), whose sum is σ = 3736756800. Its totient is φ = 3633356320.

The previous prime is 3684940759. The next prime is 3684940799. The reversal of 3684940781 is 1870494863.

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 3684940781 - 2⁶ = 3684940717 is a prime.

It is a super-2 number, since 2×3684940781² = 27157577118953779922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3684960781) 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, 25715 + ... + 89616.

It is an arithmetic number, because the mean of its divisors is an integer number (467094600).

Almost surely, 2^3684940781 is an apocalyptic number.

It is an amenable number.

3684940781 is a deficient number, since it is larger than the sum of its proper divisors (51816019).

3684940781 is a wasteful number, since it uses less digits than its factorization.

3684940781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115779.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 3684940781 is about 60703.7130742428. The cubic root of 3684940781 is about 1544.5791602780.

The spelling of 3684940781 in words is "three billion, six hundred eighty-four million, nine hundred forty thousand, seven hundred eighty-one".