1864425444 has 48 divisors (see below), whose sum is σ = 4983705216. Its totient is φ = 531417600.

The previous prime is 1864425421. The next prime is 1864425463. The reversal of 1864425444 is 4445244681.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1864425396 and 1864425405.

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, 9004 + ... + 61724.

It is an arithmetic number, because the mean of its divisors is an integer number (103827192).

Almost surely, 2^1864425444 is an apocalyptic number.

1864425444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1864425444 is an abundant number, since it is smaller than the sum of its proper divisors (3119279772).

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

1864425444 is a wasteful number, since it uses less digits than its factorization.

1864425444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53156 (or 53154 counting only the distinct ones).

The product of its digits is 491520, while the sum is 42.

The square root of 1864425444 is about 43178.9930869167. The cubic root of 1864425444 is about 1230.7835235187.

The spelling of 1864425444 in words is "one billion, eight hundred sixty-four million, four hundred twenty-five thousand, four hundred forty-four".