1640371222 has 16 divisors (see below), whose sum is σ = 2812586400. Its totient is φ = 702885888.

The previous prime is 1640371219. The next prime is 1640371223. The reversal of 1640371222 is 2221730461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640371223) 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, 133398 + ... + 145174.

It is an arithmetic number, because the mean of its divisors is an integer number (175786650).

Almost surely, 2^1640371222 is an apocalyptic number.

1640371222 is a deficient number, since it is larger than the sum of its proper divisors (1172215178).

1640371222 is a wasteful number, since it uses less digits than its factorization.

1640371222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21735.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1640371222 is about 40501.4965402514. The cubic root of 1640371222 is about 1179.3626794002.

The spelling of 1640371222 in words is "one billion, six hundred forty million, three hundred seventy-one thousand, two hundred twenty-two".