1906740 has 120 divisors (see below), whose sum is σ = 6586272. Its totient is φ = 457920.

The previous prime is 1906739. The next prime is 1906747. The reversal of 1906740 is 476091.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906747) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17767 + ... + 17873.

2^1906740 is an apocalyptic number.

1906740 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 1906740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3293136).

1906740 is an abundant number, since it is smaller than the sum of its proper divisors (4679532).

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

1906740 is a wasteful number, since it uses less digits than its factorization.

1906740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1906740 is about 1380.8475658088. The cubic root of 1906740 is about 124.0025146906.

The spelling of 1906740 in words is "one million, nine hundred six thousand, seven hundred forty".