1870663680 has 416 divisors, whose sum is σ = 7077024000. Its totient is φ = 467140608.

The previous prime is 1870663661. The next prime is 1870663687. The reversal of 1870663680 is 863660781.

1870663680 is a `hidden beast` number, since 1 + 8 + 7 + 0 + 6 + 636 + 8 + 0 = 666.

It is a super-2 number, since 2×1870663680² = 6998765207342284800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1870663687) 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, 9400221 + ... + 9400419.

Almost surely, 2^1870663680 is an apocalyptic number.

1870663680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1870663680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3538512000).

1870663680 is an abundant number, since it is smaller than the sum of its proper divisors (5206360320).

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

1870663680 is a wasteful number, since it uses less digits than its factorization.

1870663680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 1870663680 is about 43251.1696951655. The cubic root of 1870663680 is about 1232.1547003128.

The spelling of 1870663680 in words is "one billion, eight hundred seventy million, six hundred sixty-three thousand, six hundred eighty".