621326730 has 32 divisors (see below), whose sum is σ = 1492344000. Its totient is φ = 165558272.

The previous prime is 621326683. The next prime is 621326731. The reversal of 621326730 is 37623126.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (621326731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34921 + ... + 49619.

It is an arithmetic number, because the mean of its divisors is an integer number (46635750).

Almost surely, 2^621326730 is an apocalyptic number.

621326730 is an abundant number, since it is smaller than the sum of its proper divisors (871017270).

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

621326730 is a wasteful number, since it uses less digits than its factorization.

621326730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16118.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 621326730 is about 24926.4263383262. The cubic root of 621326730 is about 853.3096935929.

Adding to 621326730 its reverse (37623126), we get a palindrome (658949856).

The spelling of 621326730 in words is "six hundred twenty-one million, three hundred twenty-six thousand, seven hundred thirty".