1856424420 has 120 divisors (see below), whose sum is σ = 5852349888. Its totient is φ = 492609600.

The previous prime is 1856424419. The next prime is 1856424467. The reversal of 1856424420 is 244246581.

1856424420 is a `hidden beast` number, since 1 + 8 + 5 + 642 + 4 + 4 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 339105 + ... + 344535.

Almost surely, 2^1856424420 is an apocalyptic number.

1856424420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1856424420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2926174944).

1856424420 is an abundant number, since it is smaller than the sum of its proper divisors (3995925468).

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

1856424420 is a wasteful number, since it uses less digits than its factorization.

1856424420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663 (or 5652 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 1856424420 is about 43086.2439764712. The cubic root of 1856424420 is about 1229.0203978983.

The spelling of 1856424420 in words is "one billion, eight hundred fifty-six million, four hundred twenty-four thousand, four hundred twenty".