1913940 has 144 divisors (see below), whose sum is σ = 6988800. Its totient is φ = 423360.

The previous prime is 1913939. The next prime is 1913941. The reversal of 1913940 is 493191.

It is an interprime number because it is at equal distance from previous prime (1913939) and next prime (1913941).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61725 + ... + 61755.

2^1913940 is an apocalyptic number.

1913940 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 1913940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3494400).

1913940 is an abundant number, since it is smaller than the sum of its proper divisors (5074860).

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

1913940 is a wasteful number, since it uses less digits than its factorization.

1913940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 48 counting only the distinct ones).

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

The square root of 1913940 is about 1383.4522037281. The cubic root of 1913940 is about 124.1583997219.

The spelling of 1913940 in words is "one million, nine hundred thirteen thousand, nine hundred forty".