1640328041 has 16 divisors (see below), whose sum is σ = 1839995136. Its totient is φ = 1449360000.

The previous prime is 1640328023. The next prime is 1640328043. The reversal of 1640328041 is 1408230461.

It is not a de Polignac number, because 1640328041 - 2²⁶ = 1573219177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1640327995 and 1640328013.

It is not an unprimeable number, because it can be changed into a prime (1640328043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115511 + ... + 128931.

It is an arithmetic number, because the mean of its divisors is an integer number (114999696).

Almost surely, 2^1640328041 is an apocalyptic number.

1640328041 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1640328041 is a deficient number, since it is larger than the sum of its proper divisors (199667095).

1640328041 is a wasteful number, since it uses less digits than its factorization.

1640328041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13744.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1640328041 is about 40500.9634576759. The cubic root of 1640328041 is about 1179.3523308266.

It can be divided in two parts, 16403 and 28041, that added together give a palindrome (44444).

The spelling of 1640328041 in words is "one billion, six hundred forty million, three hundred twenty-eight thousand, forty-one".