1864641772 has 24 divisors (see below), whose sum is σ = 3734226720. Its totient is φ = 798072960.

The previous prime is 1864641733. The next prime is 1864641781. The reversal of 1864641772 is 2771464681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22447 + ... + 65062.

It is an arithmetic number, because the mean of its divisors is an integer number (155592780).

Almost surely, 2^1864641772 is an apocalyptic number.

It is an amenable number.

1864641772 is an abundant number, since it is smaller than the sum of its proper divisors (1869584948).

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

1864641772 is a wasteful number, since it uses less digits than its factorization.

1864641772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88281 (or 88279 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 1864641772 is about 43181.4980286696. The cubic root of 1864641772 is about 1230.8311239992.

The spelling of 1864641772 in words is "one billion, eight hundred sixty-four million, six hundred forty-one thousand, seven hundred seventy-two".