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628400 = 24521571
BaseRepresentation
bin10011001011010110000
31011221000002
42121122300
5130102100
621245132
75225033
oct2313260
91157002
10628400
1139a143
122637a8
13190046
1412501a
15c62d5
hex996b0

628400 has 30 divisors (see below), whose sum is σ = 1510692. Its totient is φ = 251200.

The previous prime is 628399. The next prime is 628423. The reversal of 628400 is 4826.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628400.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 386 + ... + 1185.

2628400 is an apocalyptic number.

It is an amenable number.

628400 is an abundant number, since it is smaller than the sum of its proper divisors (882292).

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

628400 is a wasteful number, since it uses less digits than its factorization.

628400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 628400 is about 792.7168473043. The cubic root of 628400 is about 85.6535548643.

The spelling of 628400 in words is "six hundred twenty-eight thousand, four hundred".

Divisors: 1 2 4 5 8 10 16 20 25 40 50 80 100 200 400 1571 3142 6284 7855 12568 15710 25136 31420 39275 62840 78550 125680 157100 314200 628400