3887420409 has 18 divisors (see below), whose sum is σ = 5680833210. Its totient is φ = 2561331168.

The previous prime is 3887420399. The next prime is 3887420423. The reversal of 3887420409 is 9040247883.

It can be written as a sum of positive squares in only one way, i.e., 2795448384 + 1091972025 = 52872^2 + 33045^2 .

It is not a de Polignac number, because 3887420409 - 2⁹ = 3887419897 is a prime.

It is a super-2 number, since 2×3887420409² = 30224074872619454562, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3887420909) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1763502 + ... + 1765704.

It is an arithmetic number, because the mean of its divisors is an integer number (315601845).

Almost surely, 2^3887420409 is an apocalyptic number.

It is an amenable number.

3887420409 is a deficient number, since it is larger than the sum of its proper divisors (1793412801).

3887420409 is an frugal number, since it uses more digits than its factorization.

3887420409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501 (or 2295 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 3887420409 is about 62349.1813017621. The cubic root of 3887420409 is about 1572.3666969364.

The spelling of 3887420409 in words is "three billion, eight hundred eighty-seven million, four hundred twenty thousand, four hundred nine".