1705428 has 24 divisors (see below), whose sum is σ = 4421760. Its totient is φ = 568440.

The previous prime is 1705409. The next prime is 1705433. The reversal of 1705428 is 8245071.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7788 + ... + 8003.

It is an arithmetic number, because the mean of its divisors is an integer number (184240).

2^1705428 is an apocalyptic number.

1705428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1705428 is an abundant number, since it is smaller than the sum of its proper divisors (2716332).

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

1705428 is a wasteful number, since it uses less digits than its factorization.

1705428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15804 (or 15796 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1705428 is about 1305.9203651065. The cubic root of 1705428 is about 119.4752082928.

The spelling of 1705428 in words is "one million, seven hundred five thousand, four hundred twenty-eight".