8628421440 has 56 divisors (see below), whose sum is σ = 27395241120. Its totient is φ = 2300912128.

The previous prime is 8628421421. The next prime is 8628421447. The reversal of 8628421440 is 441248268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8628421447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4493010 + ... + 4494929.

Almost surely, 2^8628421440 is an apocalyptic number.

8628421440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8628421440 is an abundant number, since it is smaller than the sum of its proper divisors (18766819680).

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

8628421440 is a wasteful number, since it uses less digits than its factorization.

8628421440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8987959 (or 8987949 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 39.

The square root of 8628421440 is about 92889.2966923531. The cubic root of 8628421440 is about 2051.0541031416.

The spelling of 8628421440 in words is "eight billion, six hundred twenty-eight million, four hundred twenty-one thousand, four hundred forty".