622430640 has 120 divisors (see below), whose sum is σ = 2251158000. Its totient is φ = 153211392.

The previous prime is 622430573. The next prime is 622430647. The reversal of 622430640 is 46034226.

622430640 is a `hidden beast` number, since 622 + 4 + 30 + 6 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×622430640² = 774839803221619200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622430647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23890 + ... + 42609.

It is an arithmetic number, because the mean of its divisors is an integer number (18759650).

Almost surely, 2^622430640 is an apocalyptic number.

622430640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

622430640 is an abundant number, since it is smaller than the sum of its proper divisors (1628727360).

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

622430640 is a wasteful number, since it uses less digits than its factorization.

622430640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66531 (or 66522 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 622430640 is about 24948.5598782775. The cubic root of 622430640 is about 853.8147524928.

Adding to 622430640 its reverse (46034226), we get a palindrome (668464866).

It can be divided in two parts, 6224 and 30640, that added together give a square (36864 = 192²).

The spelling of 622430640 in words is "six hundred twenty-two million, four hundred thirty thousand, six hundred forty".