1864015648 has 36 divisors (see below), whose sum is σ = 4033734390. Its totient is φ = 847278080.

The previous prime is 1864015639. The next prime is 1864015651. The reversal of 1864015648 is 8465104681.

It can be written as a sum of positive squares in only one way, i.e., 1649334544 + 214681104 = 40612^2 + 14652^2 .

It is a super-3 number, since 3×1864015648³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236833 + ... + 244576.

Almost surely, 2^1864015648 is an apocalyptic number.

It is an amenable number.

1864015648 is an abundant number, since it is smaller than the sum of its proper divisors (2169718742).

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

1864015648 is a wasteful number, since it uses less digits than its factorization.

1864015648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481441 (or 481422 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 1864015648 is about 43174.2475093660. The cubic root of 1864015648 is about 1230.6933425420.

The spelling of 1864015648 in words is "one billion, eight hundred sixty-four million, fifteen thousand, six hundred forty-eight".