1868686672 has 10 divisors (see below), whose sum is σ = 3620580458. Its totient is φ = 934343328.

The previous prime is 1868686663. The next prime is 1868686679. The reversal of 1868686672 is 2766868681.

It can be written as a sum of positive squares in only one way, i.e., 1183084816 + 685601856 = 34396^2 + 26184^2 .

It is a super-2 number, since 2×1868686672² = 6983979756220871168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868686679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58396443 + ... + 58396474.

Almost surely, 2^1868686672 is an apocalyptic number.

It is an amenable number.

1868686672 is a deficient number, since it is larger than the sum of its proper divisors (1751893786).

1868686672 is a wasteful number, since it uses less digits than its factorization.

1868686672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116792925 (or 116792919 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 58.

The square root of 1868686672 is about 43228.3086877106. The cubic root of 1868686672 is about 1231.7204803826.

The spelling of 1868686672 in words is "one billion, eight hundred sixty-eight million, six hundred eighty-six thousand, six hundred seventy-two".