1906340 has 12 divisors (see below), whose sum is σ = 4003356. Its totient is φ = 762528.

The previous prime is 1906337. The next prime is 1906343. The reversal of 1906340 is 436091.

It is an interprime number because it is at equal distance from previous prime (1906337) and next prime (1906343).

It can be written as a sum of positive squares in 2 ways, for example, as 1304164 + 602176 = 1142^2 + 776^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906343) 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, 47639 + ... + 47678.

It is an arithmetic number, because the mean of its divisors is an integer number (333613).

2^1906340 is an apocalyptic number.

1906340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1906340 is an abundant number, since it is smaller than the sum of its proper divisors (2097016).

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

1906340 is a wasteful number, since it uses less digits than its factorization.

1906340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95326 (or 95324 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1906340 is about 1380.7027196323. The cubic root of 1906340 is about 123.9938429132.

The spelling of 1906340 in words is "one million, nine hundred six thousand, three hundred forty".