1953990 has 32 divisors (see below), whose sum is σ = 5211360. Its totient is φ = 520992.

The previous prime is 1953983. The next prime is 1954003. The reversal of 1953990 is 993591.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3349 + ... + 3888.

It is an arithmetic number, because the mean of its divisors is an integer number (162855).

2^1953990 is an apocalyptic number.

1953990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1953990 is an abundant number, since it is smaller than the sum of its proper divisors (3257370).

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

1953990 is a wasteful number, since it uses less digits than its factorization.

1953990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7253 (or 7247 counting only the distinct ones).

The product of its (nonzero) digits is 10935, while the sum is 36.

The square root of 1953990 is about 1397.8519234883. The cubic root of 1953990 is about 125.0184506098.

The spelling of 1953990 in words is "one million, nine hundred fifty-three thousand, nine hundred ninety".