620345650 has 48 divisors (see below), whose sum is σ = 1242920448. Its totient is φ = 229680000.

The previous prime is 620345639. The next prime is 620345651. The reversal of 620345650 is 56543026.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a house number.

It is not an unprimeable number, because it can be changed into a prime (620345651) 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, 26950 + ... + 44350.

It is an arithmetic number, because the mean of its divisors is an integer number (25894176).

Almost surely, 2^620345650 is an apocalyptic number.

620345650 is an abundant number, since it is smaller than the sum of its proper divisors (622574798).

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

620345650 is a wasteful number, since it uses less digits than its factorization.

620345650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17467 (or 17462 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 620345650 is about 24906.7390478963. The cubic root of 620345650 is about 852.8603293262.

Adding to 620345650 its reverse (56543026), we get a palindrome (676888676).

The spelling of 620345650 in words is "six hundred twenty million, three hundred forty-five thousand, six hundred fifty".