3987420 has 24 divisors (see below), whose sum is σ = 11164944. Its totient is φ = 1063296.

The previous prime is 3987409. The next prime is 3987421. The reversal of 3987420 is 247893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987421) 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, 33169 + ... + 33288.

It is an arithmetic number, because the mean of its divisors is an integer number (465206).

Almost surely, 2^3987420 is an apocalyptic number.

3987420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3987420 is an abundant number, since it is smaller than the sum of its proper divisors (7177524).

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

3987420 is a wasteful number, since it uses less digits than its factorization.

3987420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66469 (or 66467 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 3987420 is about 1996.8525233477. The cubic root of 3987420 is about 158.5735178919.

The spelling of 3987420 in words is "three million, nine hundred eighty-seven thousand, four hundred twenty".