1855420344 has 40 divisors (see below), whose sum is σ = 5196896760. Its totient is φ = 618473232.

The previous prime is 1855420331. The next prime is 1855420393. The reversal of 1855420344 is 4430245581.

It is a happy number.

1855420344 is a `hidden beast` number, since 1 + 85 + 542 + 0 + 34 + 4 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1855420299 and 1855420308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1431004 + ... + 1432299.

It is an arithmetic number, because the mean of its divisors is an integer number (129922419).

Almost surely, 2^1855420344 is an apocalyptic number.

It is an amenable number.

1855420344 is an abundant number, since it is smaller than the sum of its proper divisors (3341476416).

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

1855420344 is a wasteful number, since it uses less digits than its factorization.

1855420344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863321 (or 2863308 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 1855420344 is about 43074.5904681635. The cubic root of 1855420344 is about 1228.7987796771.

The spelling of 1855420344 in words is "one billion, eight hundred fifty-five million, four hundred twenty thousand, three hundred forty-four".