1909420 has 12 divisors (see below), whose sum is σ = 4009824. Its totient is φ = 763760.

The previous prime is 1909409. The next prime is 1909421. The reversal of 1909420 is 249091.

It is not an unprimeable number, because it can be changed into a prime (1909421) 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, 47716 + ... + 47755.

It is an arithmetic number, because the mean of its divisors is an integer number (334152).

2^1909420 is an apocalyptic number.

1909420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1909420 is an abundant number, since it is smaller than the sum of its proper divisors (2100404).

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

1909420 is a wasteful number, since it uses less digits than its factorization.

1909420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95480 (or 95478 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1909420 is about 1381.8176435406. The cubic root of 1909420 is about 124.0605843385.

The spelling of 1909420 in words is "one million, nine hundred nine thousand, four hundred twenty".