1990464 has 56 divisors (see below), whose sum is σ = 6022848. Its totient is φ = 568320.

The previous prime is 1990463. The next prime is 1990481. The reversal of 1990464 is 4640991.

1990464 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (56).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604 + ... + 2084.

2^1990464 is an apocalyptic number.

1990464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1990464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3011424).

1990464 is an abundant number, since it is smaller than the sum of its proper divisors (4032384).

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

1990464 is a wasteful number, since it uses less digits than its factorization.

1990464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1990464 is about 1410.8380488206. The cubic root of 1990464 is about 125.7915424380.

The spelling of 1990464 in words is "one million, nine hundred ninety thousand, four hundred sixty-four".