1963990 has 16 divisors (see below), whose sum is σ = 4040352. Its totient is φ = 673344.

The previous prime is 1963981. The next prime is 1963999. The reversal of 1963990 is 993691.

It is an interprime number because it is at equal distance from previous prime (1963981) and next prime (1963999).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1963999) 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, 13959 + ... + 14098.

It is an arithmetic number, because the mean of its divisors is an integer number (252522).

2^1963990 is an apocalyptic number.

1963990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1963990 is an abundant number, since it is smaller than the sum of its proper divisors (2076362).

1963990 is a wasteful number, since it uses less digits than its factorization.

1963990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28071.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 1963990 is about 1401.4242755140. The cubic root of 1963990 is about 125.2313581896.

Subtracting from 1963990 its reverse (993691), we obtain a cube (970299 = 99³).

It can be divided in two parts, 196 and 3990, that added together give a triangular number (4186 = T₉₁).

The spelling of 1963990 in words is "one million, nine hundred sixty-three thousand, nine hundred ninety".