1863411840 has 96 divisors (see below), whose sum is σ = 6434613900. Its totient is φ = 496908288.

The previous prime is 1863411821. The next prime is 1863411881. The reversal of 1863411840 is 481143681.

It is a happy number.

1863411840 is a `hidden beast` number, since 1 + 8 + 634 + 1 + 18 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1573867584 + 289544256 = 39672^2 + 17016^2 .

It is a tau number, because it is divible by the number of its divisors (96).

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 = 1863411795 and 1863411804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155995 + ... + 167514.

Almost surely, 2^1863411840 is an apocalyptic number.

1863411840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1863411840 is an abundant number, since it is smaller than the sum of its proper divisors (4571202060).

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

1863411840 is a wasteful number, since it uses less digits than its factorization.

1863411840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323534 (or 323519 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 1863411840 is about 43167.2542559751. The cubic root of 1863411840 is about 1230.5604425959.

The spelling of 1863411840 in words is "one billion, eight hundred sixty-three million, four hundred eleven thousand, eight hundred forty".