1864003216 has 160 divisors (see below), whose sum is σ = 4157733888. Its totient is φ = 805109760.

The previous prime is 1864003201. The next prime is 1864003241. The reversal of 1864003216 is 6123004681.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19216480 + ... + 19216576.

Almost surely, 2^1864003216 is an apocalyptic number.

1864003216 is a gapful number since it is divisible by the number (16) 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 1864003216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2078866944).

1864003216 is an abundant number, since it is smaller than the sum of its proper divisors (2293730672).

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

1864003216 is a wasteful number, since it uses less digits than its factorization.

1864003216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 1864003216 is about 43174.1035344105. The cubic root of 1864003216 is about 1230.6906065111.

Adding to 1864003216 its reverse (6123004681), we get a palindrome (7987007897).

The spelling of 1864003216 in words is "one billion, eight hundred sixty-four million, three thousand, two hundred sixteen".