1864247827890 has 64 divisors (see below), whose sum is σ = 5113496853504. Its totient is φ = 426102840768.

The previous prime is 1864247827837. The next prime is 1864247827891. The reversal of 1864247827890 is 987287424681.

It is not an unprimeable number, because it can be changed into a prime (1864247827891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10366117 + ... + 10544423.

It is an arithmetic number, because the mean of its divisors is an integer number (79898388336).

Almost surely, 2^{1864247827890} is an apocalyptic number.

1864247827890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1864247827890 is an abundant number, since it is smaller than the sum of its proper divisors (3249249025614).

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

1864247827890 is a wasteful number, since it uses less digits than its factorization.

1864247827890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228111.

The product of its (nonzero) digits is 86704128, while the sum is 66.

The spelling of 1864247827890 in words is "one trillion, eight hundred sixty-four billion, two hundred forty-seven million, eight hundred twenty-seven thousand, eight hundred ninety".