3987700440 has 64 divisors (see below), whose sum is σ = 12483244800. Its totient is φ = 1017151872.

The previous prime is 3987700427. The next prime is 3987700471. The reversal of 3987700440 is 440077893.

It is a junction number, because it is equal to n+sod(n) for n = 3987700392 and 3987700401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719650 + ... + 725169.

It is an arithmetic number, because the mean of its divisors is an integer number (195050700).

Almost surely, 2^3987700440 is an apocalyptic number.

3987700440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3987700440 is an abundant number, since it is smaller than the sum of its proper divisors (8495544360).

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

3987700440 is a wasteful number, since it uses less digits than its factorization.

3987700440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444856 (or 1444852 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 3987700440 is about 63148.2417807495. The cubic root of 3987700440 is about 1585.7723535961.

The spelling of 3987700440 in words is "three billion, nine hundred eighty-seven million, seven hundred thousand, four hundred forty".