1620632 has 16 divisors (see below), whose sum is σ = 3272640. Its totient is φ = 747936.

The previous prime is 1620631. The next prime is 1620667. The reversal of 1620632 is 2360261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7688 + ... + 7895.

It is an arithmetic number, because the mean of its divisors is an integer number (204540).

2^1620632 is an apocalyptic number.

It is an amenable number.

1620632 is an abundant number, since it is smaller than the sum of its proper divisors (1652008).

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

1620632 is a wasteful number, since it uses less digits than its factorization.

1620632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15602 (or 15598 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1620632 is about 1273.0404549738. The cubic root of 1620632 is about 117.4613000664.

Adding to 1620632 its reverse (2360261), we get a palindrome (3980893).

The spelling of 1620632 in words is "one million, six hundred twenty thousand, six hundred thirty-two".