1906728 has 32 divisors (see below), whose sum is σ = 4860000. Its totient is φ = 623168.

The previous prime is 1906727. The next prime is 1906733. The reversal of 1906728 is 8276091.

It is a super-2 number, since 2×1906728² = 7271223331968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1906727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523 + ... + 2021.

It is an arithmetic number, because the mean of its divisors is an integer number (151875).

2^1906728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1906728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2430000).

1906728 is an abundant number, since it is smaller than the sum of its proper divisors (2953272).

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

1906728 is a wasteful number, since it uses less digits than its factorization.

1906728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 1906728 is about 1380.8432206445. The cubic root of 1906728 is about 124.0022545549.

The spelling of 1906728 in words is "one million, nine hundred six thousand, seven hundred twenty-eight".