1626623420 has 24 divisors (see below), whose sum is σ = 3436370784. Its totient is φ = 646751936.

The previous prime is 1626623417. The next prime is 1626623429. The reversal of 1626623420 is 243266261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1626623429) 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, 240167 + ... + 246846.

It is an arithmetic number, because the mean of its divisors is an integer number (143182116).

Almost surely, 2^1626623420 is an apocalyptic number.

1626623420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1626623420 is an abundant number, since it is smaller than the sum of its proper divisors (1809747364).

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

1626623420 is a wasteful number, since it uses less digits than its factorization.

1626623420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487189 (or 487187 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 1626623420 is about 40331.4197617689. The cubic root of 1626623420 is about 1176.0587216347.

Adding to 1626623420 its reverse (243266261), we get a palindrome (1869889681).

The spelling of 1626623420 in words is "one billion, six hundred twenty-six million, six hundred twenty-three thousand, four hundred twenty".