3871740 has 48 divisors (see below), whose sum is σ = 10932768. Its totient is φ = 1023744.

The previous prime is 3871691. The next prime is 3871759. The reversal of 3871740 is 471783.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3871698 and 3871707.

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, 10194 + ... + 10566.

It is an arithmetic number, because the mean of its divisors is an integer number (227766).

Almost surely, 2^3871740 is an apocalyptic number.

3871740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3871740 is an abundant number, since it is smaller than the sum of its proper divisors (7061028).

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

3871740 is a wasteful number, since it uses less digits than its factorization.

3871740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 3871740 is about 1967.6737534459. The cubic root of 3871740 is about 157.0249733760.

It can be divided in two parts, 387 and 1740, that multiplied together give a triangular number (673380 = T₁₁₆₀).

The spelling of 3871740 in words is "three million, eight hundred seventy-one thousand, seven hundred forty".