1421618688 has 400 divisors, whose sum is σ = 4990930560. Its totient is φ = 394481664.

The previous prime is 1421618647. The next prime is 1421618689. The reversal of 1421618688 is 8868161241.

1421618688 is a `hidden beast` number, since 1 + 4 + 21 + 618 + 6 + 8 + 8 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421618689) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17127895 + ... + 17127977.

It is a vampire number, since it can be written as 16128 ⋅ 88146 (with its own digits).

Almost surely, 2^1421618688 is an apocalyptic number.

1421618688 is a gapful number since it is divisible by the number (18) 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 1421618688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2495465280).

1421618688 is an abundant number, since it is smaller than the sum of its proper divisors (3569311872).

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

1421618688 is an frugal number, since it uses more digits than its factorization.

1421618688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 154 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 1421618688 is about 37704.3590052927. The cubic root of 1421618688 is about 1124.4177894127.

The spelling of 1421618688 in words is "one billion, four hundred twenty-one million, six hundred eighteen thousand, six hundred eighty-eight".