1928641 has 8 divisors (see below), whose sum is σ = 2265984. Its totient is φ = 1618320.

The previous prime is 1928629. The next prime is 1928653. The reversal of 1928641 is 1468291.

1928641 = T₂₀₈ + T₂₀₉ + ... + T₂₇₃.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1928629) and next prime (1928653).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1928641 - 2⁷ = 1928513 is a prime.

It is a super-2 number, since 2×1928641² = 7439312213762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1928621) 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, 6601 + ... + 6886.

It is an arithmetic number, because the mean of its divisors is an integer number (283248).

2^1928641 is an apocalyptic number.

1928641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1928641 is a deficient number, since it is larger than the sum of its proper divisors (337343).

1928641 is a wasteful number, since it uses less digits than its factorization.

1928641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13511.

The product of its digits is 3456, while the sum is 31.

The square root of 1928641 is about 1388.7551980101. The cubic root of 1928641 is about 124.4754767481.

The spelling of 1928641 in words is "one million, nine hundred twenty-eight thousand, six hundred forty-one".