1640227434 has 8 divisors (see below), whose sum is σ = 3280454880. Its totient is φ = 546742476.

The previous prime is 1640227409. The next prime is 1640227441. The reversal of 1640227434 is 4347220461.

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

1640227434 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1640227395 and 1640227404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136685614 + ... + 136685625.

It is an arithmetic number, because the mean of its divisors is an integer number (410056860).

Almost surely, 2^1640227434 is an apocalyptic number.

1640227434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1640227434 is a wasteful number, since it uses less digits than its factorization.

1640227434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273371244.

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 1640227434 is about 40499.7214064492. The cubic root of 1640227434 is about 1179.3282190793.

Adding to 1640227434 its reverse (4347220461), we get a palindrome (5987447895).

The spelling of 1640227434 in words is "one billion, six hundred forty million, two hundred twenty-seven thousand, four hundred thirty-four".