628185240 has 256 divisors, whose sum is σ = 2239488000. Its totient is φ = 156280320.

The previous prime is 628185197. The next prime is 628185247. The reversal of 628185240 is 42581826.

628185240 is a `hidden beast` number, since 628 + 1 + 8 + 5 + 24 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 628185195 and 628185204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628185247) 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 63 ways as a sum of consecutive naturals, for example, 970597 + ... + 971243.

It is an arithmetic number, because the mean of its divisors is an integer number (8748000).

Almost surely, 2^628185240 is an apocalyptic number.

628185240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628185240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119744000).

628185240 is an abundant number, since it is smaller than the sum of its proper divisors (1611302760).

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

628185240 is a wasteful number, since it uses less digits than its factorization.

628185240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 628185240 is about 25063.6238401393. The cubic root of 628185240 is about 856.4379618973.

The spelling of 628185240 in words is "six hundred twenty-eight million, one hundred eighty-five thousand, two hundred forty".