1993740 has 96 divisors (see below), whose sum is σ = 6580224. Its totient is φ = 441600.
The previous prime is 1993729. The next prime is 1993757. The reversal of 1993740 is 473991.
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19690 + ... + 19790.
It is an arithmetic number, because the mean of its divisors is an integer number (68544).
21993740 is an apocalyptic number.
1993740 is a gapful number since it is divisible by the number (10) 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 1993740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3290112).
1993740 is an abundant number, since it is smaller than the sum of its proper divisors (4586484).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1993740 is a wasteful number, since it uses less digits than its factorization.
1993740 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 167 (or 165 counting only the distinct ones).
The product of its (nonzero) digits is 6804, while the sum is 33.
The square root of 1993740 is about 1411.9985835687. The cubic root of 1993740 is about 125.8605158396.
The spelling of 1993740 in words is "one million, nine hundred ninety-three thousand, seven hundred forty".
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