3858240 has 56 divisors (see below), whose sum is σ = 12252960. Its totient is φ = 1028608.

The previous prime is 3858233. The next prime is 3858251. The reversal of 3858240 is 428583.

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 = 3858198 and 3858207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1050 + ... + 2969.

Almost surely, 2^3858240 is an apocalyptic number.

3858240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3858240 is an abundant number, since it is smaller than the sum of its proper divisors (8394720).

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

3858240 is a wasteful number, since it uses less digits than its factorization.

3858240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039 (or 4029 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 3858240 is about 1964.2403111636. The cubic root of 3858240 is about 156.8422557225.

The spelling of 3858240 in words is "three million, eight hundred fifty-eight thousand, two hundred forty".