1974640 has 20 divisors (see below), whose sum is σ = 4591224. Its totient is φ = 789824.

The previous prime is 1974569. The next prime is 1974641. The reversal of 1974640 is 464791.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1974641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12262 + ... + 12421.

2^1974640 is an apocalyptic number.

1974640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1974640 is an abundant number, since it is smaller than the sum of its proper divisors (2616584).

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

1974640 is a wasteful number, since it uses less digits than its factorization.

1974640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24696 (or 24690 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1974640 is about 1405.2188441663. The cubic root of 1974640 is about 125.4573115555.

The spelling of 1974640 in words is "one million, nine hundred seventy-four thousand, six hundred forty".