3991907774 has 8 divisors (see below), whose sum is σ = 5988141120. Its totient is φ = 1995860736.

The previous prime is 3991907767. The next prime is 3991907783. The reversal of 3991907774 is 4777091993.

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

It is a super-2 number, since 2×3991907774² = 31870655352243270152, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36947 + ... + 96689.

It is an arithmetic number, because the mean of its divisors is an integer number (748517640).

Almost surely, 2^3991907774 is an apocalyptic number.

3991907774 is a deficient number, since it is larger than the sum of its proper divisors (1996233346).

3991907774 is a wasteful number, since it uses less digits than its factorization.

3991907774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93154.

The product of its (nonzero) digits is 3000564, while the sum is 56.

The square root of 3991907774 is about 63181.5461507551. The cubic root of 3991907774 is about 1586.3298619450.

The spelling of 3991907774 in words is "three billion, nine hundred ninety-one million, nine hundred seven thousand, seven hundred seventy-four".