622640400 has 60 divisors (see below), whose sum is σ = 1994528592. Its totient is φ = 166037120.

The previous prime is 622640371. The next prime is 622640401. The reversal of 622640400 is 4046226.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (622640401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258234 + ... + 260633.

Almost surely, 2^622640400 is an apocalyptic number.

622640400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

622640400 is an abundant number, since it is smaller than the sum of its proper divisors (1371888192).

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

622640400 is a wasteful number, since it uses less digits than its factorization.

622640400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518888 (or 518877 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 622640400 is about 24952.7633740233. The cubic root of 622640400 is about 853.9106539776.

Adding to 622640400 its reverse (4046226), we get a palindrome (626686626).

It can be divided in two parts, 62 and 2640400, that added together give a palindrome (2640462).

The spelling of 622640400 in words is "six hundred twenty-two million, six hundred forty thousand, four hundred".