3766398987 has 16 divisors (see below), whose sum is σ = 5409411840. Its totient is φ = 2317248672.

The previous prime is 3766398967. The next prime is 3766398991. The reversal of 3766398987 is 7898936673.

It is a happy number.

It is not a de Polignac number, because 3766398987 - 2⁷ = 3766398859 is a prime.

It is a super-2 number, since 2×3766398987² = 28371522658549252338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3766398907) 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, 221068 + ... + 237494.

It is an arithmetic number, because the mean of its divisors is an integer number (338088240).

Almost surely, 2^3766398987 is an apocalyptic number.

3766398987 is a deficient number, since it is larger than the sum of its proper divisors (1643012853).

3766398987 is a wasteful number, since it uses less digits than its factorization.

3766398987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22322.

The product of its digits is 82301184, while the sum is 66.

The square root of 3766398987 is about 61370.9946717503. The cubic root of 3766398987 is about 1555.8776471211.

It can be divided in two parts, 3766 and 398987, that added together give a triangular number (402753 = T₈₉₇).

The spelling of 3766398987 in words is "three billion, seven hundred sixty-six million, three hundred ninety-eight thousand, nine hundred eighty-seven".