1973940 has 48 divisors (see below), whose sum is σ = 5588352. Its totient is φ = 520576.

The previous prime is 1973927. The next prime is 1973957. The reversal of 1973940 is 493791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9922 + ... + 10118.

It is an arithmetic number, because the mean of its divisors is an integer number (116424).

2^1973940 is an apocalyptic number.

1973940 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 1973940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2794176).

1973940 is an abundant number, since it is smaller than the sum of its proper divisors (3614412).

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

1973940 is a wasteful number, since it uses less digits than its factorization.

1973940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 1973940 is about 1404.9697505640. The cubic root of 1973940 is about 125.4424851403.

Subtracting from 1973940 its product of nonzero digits (6804), we obtain a triangular number (1967136 = T₁₉₈₃).

The spelling of 1973940 in words is "one million, nine hundred seventy-three thousand, nine hundred forty".