1431990 has 48 divisors (see below), whose sum is σ = 4256928. Its totient is φ = 327168.

The previous prime is 1431977. The next prime is 1432001. The reversal of 1431990 is 991341.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 507 + ... + 1766.

It is an arithmetic number, because the mean of its divisors is an integer number (88686).

2^1431990 is an apocalyptic number.

1431990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1431990 is an abundant number, since it is smaller than the sum of its proper divisors (2824938).

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

1431990 is a wasteful number, since it uses less digits than its factorization.

1431990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293 (or 2290 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1431990 is about 1196.6578458356. The cubic root of 1431990 is about 112.7145535187.

The spelling of 1431990 in words is "one million, four hundred thirty-one thousand, nine hundred ninety".