1642605340 has 24 divisors (see below), whose sum is σ = 3474655632. Its totient is φ = 652245120.

The previous prime is 1642605313. The next prime is 1642605379. The reversal of 1642605340 is 435062461.

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, 297006 + ... + 302485.

It is an arithmetic number, because the mean of its divisors is an integer number (144777318).

Almost surely, 2^1642605340 is an apocalyptic number.

1642605340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642605340 is an abundant number, since it is smaller than the sum of its proper divisors (1832050292).

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

1642605340 is a wasteful number, since it uses less digits than its factorization.

1642605340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599637 (or 599635 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 1642605340 is about 40529.0678402551. The cubic root of 1642605340 is about 1179.8978509679.

The spelling of 1642605340 in words is "one billion, six hundred forty-two million, six hundred five thousand, three hundred forty".