1642222460 has 24 divisors (see below), whose sum is σ = 3528870576. Its totient is φ = 641612160.

The previous prime is 1642222451. The next prime is 1642222499. The reversal of 1642222460 is 642222461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 953921 + ... + 955640.

It is an arithmetic number, because the mean of its divisors is an integer number (147036274).

Almost surely, 2^1642222460 is an apocalyptic number.

1642222460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642222460 is an abundant number, since it is smaller than the sum of its proper divisors (1886648116).

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

1642222460 is a wasteful number, since it uses less digits than its factorization.

1642222460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909613 (or 1909611 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 1642222460 is about 40524.3440415758. The cubic root of 1642222460 is about 1179.8061684878.

Subtracting from 1642222460 its reverse (642222461), we obtain a palindrome (999999999).

The spelling of 1642222460 in words is "one billion, six hundred forty-two million, two hundred twenty-two thousand, four hundred sixty".