620242440 has 32 divisors (see below), whose sum is σ = 1860727680. Its totient is φ = 165397952.

The previous prime is 620242421. The next prime is 620242457. The reversal of 620242440 is 44242026.

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

It is a self number, because there is not a number n which added to its sum of digits gives 620242440.

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, 2584224 + ... + 2584463.

It is an arithmetic number, because the mean of its divisors is an integer number (58147740).

Almost surely, 2^620242440 is an apocalyptic number.

620242440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620242440 is an abundant number, since it is smaller than the sum of its proper divisors (1240485240).

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

620242440 is a wasteful number, since it uses less digits than its factorization.

620242440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5168701 (or 5168697 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 620242440 is about 24904.6670325062. The cubic root of 620242440 is about 852.8130284938.

Adding to 620242440 its reverse (44242026), we get a palindrome (664484466).

The spelling of 620242440 in words is "six hundred twenty million, two hundred forty-two thousand, four hundred forty".