3987400 has 24 divisors (see below), whose sum is σ = 9271170. Its totient is φ = 1594880.

The previous prime is 3987353. The next prime is 3987407. The reversal of 3987400 is 47893.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2292196 + 1695204 = 1514^2 + 1302^2 .

It is not an unprimeable number, because it can be changed into a prime (3987407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9769 + ... + 10168.

Almost surely, 2^3987400 is an apocalyptic number.

It is an amenable number.

3987400 is an abundant number, since it is smaller than the sum of its proper divisors (5283770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3987400 is a wasteful number, since it uses less digits than its factorization.

3987400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19953 (or 19944 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 3987400 is about 1996.8475154603. The cubic root of 3987400 is about 158.5732527685.

The spelling of 3987400 in words is "three million, nine hundred eighty-seven thousand, four hundred".