1630856 has 8 divisors (see below), whose sum is σ = 3057870. Its totient is φ = 815424.

The previous prime is 1630843. The next prime is 1630859. The reversal of 1630856 is 6580361.

It can be written as a sum of positive squares in only one way, i.e., 1612900 + 17956 = 1270^2 + 134^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1630859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101921 + ... + 101936.

2^1630856 is an apocalyptic number.

It is an amenable number.

1630856 is a deficient number, since it is larger than the sum of its proper divisors (1427014).

1630856 is a wasteful number, since it uses less digits than its factorization.

1630856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203863 (or 203859 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1630856 is about 1277.0497249520. The cubic root of 1630856 is about 117.7077898601.

The spelling of 1630856 in words is "one million, six hundred thirty thousand, eight hundred fifty-six".