1868628650 has 24 divisors (see below), whose sum is σ = 3972171360. Its totient is φ = 640672560.

The previous prime is 1868628647. The next prime is 1868628653. The reversal of 1868628650 is 568268681.

It is an interprime number because it is at equal distance from previous prime (1868628647) and next prime (1868628653).

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (1868628653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2669120 + ... + 2669819.

It is an arithmetic number, because the mean of its divisors is an integer number (165507140).

Almost surely, 2^1868628650 is an apocalyptic number.

1868628650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1868628650 is an abundant number, since it is smaller than the sum of its proper divisors (2103542710).

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

1868628650 is a wasteful number, since it uses less digits than its factorization.

1868628650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5338958 (or 5338953 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 50.

The square root of 1868628650 is about 43227.6375713501. The cubic root of 1868628650 is about 1231.7077321022.

The spelling of 1868628650 in words is "one billion, eight hundred sixty-eight million, six hundred twenty-eight thousand, six hundred fifty".