1630390 has 16 divisors (see below), whose sum is σ = 3089520. Its totient is φ = 617760.

The previous prime is 1630381. The next prime is 1630393. The reversal of 1630390 is 930361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1630393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4101 + ... + 4480.

It is an arithmetic number, because the mean of its divisors is an integer number (193095).

2^1630390 is an apocalyptic number.

1630390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1630390 is a deficient number, since it is larger than the sum of its proper divisors (1459130).

1630390 is a wasteful number, since it uses less digits than its factorization.

1630390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8607.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 1630390 is about 1276.8672601332. The cubic root of 1630390 is about 117.6965775366.

The spelling of 1630390 in words is "one million, six hundred thirty thousand, three hundred ninety".