621596940 has 24 divisors (see below), whose sum is σ = 1740471600. Its totient is φ = 165759168.

The previous prime is 621596939. The next prime is 621596953. The reversal of 621596940 is 49695126.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 621596892 and 621596901.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5179915 + ... + 5180034.

It is an arithmetic number, because the mean of its divisors is an integer number (72519650).

Almost surely, 2^621596940 is an apocalyptic number.

621596940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

621596940 is an abundant number, since it is smaller than the sum of its proper divisors (1118874660).

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

621596940 is a wasteful number, since it uses less digits than its factorization.

621596940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10359961 (or 10359959 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 621596940 is about 24931.8459003741. The cubic root of 621596940 is about 853.4333748406.

The spelling of 621596940 in words is "six hundred twenty-one million, five hundred ninety-six thousand, nine hundred forty".