1856240 has 20 divisors (see below), whose sum is σ = 4315944. Its totient is φ = 742464.

The previous prime is 1856237. The next prime is 1856269. The reversal of 1856240 is 426581.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11522 + ... + 11681.

2^1856240 is an apocalyptic number.

1856240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1856240 is an abundant number, since it is smaller than the sum of its proper divisors (2459704).

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

1856240 is a wasteful number, since it uses less digits than its factorization.

1856240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23216 (or 23210 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1856240 is about 1362.4389894597. The cubic root of 1856240 is about 122.8979698971.

The spelling of 1856240 in words is "one million, eight hundred fifty-six thousand, two hundred forty".