1642320460 has 96 divisors (see below), whose sum is σ = 3959020800. Its totient is φ = 566711040.

The previous prime is 1642320409. The next prime is 1642320473. The reversal of 1642320460 is 640232461.

It is a super-2 number, since 2×1642320460² = 5394432986669223200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 374239 + ... + 378601.

It is an arithmetic number, because the mean of its divisors is an integer number (41239800).

Almost surely, 2^1642320460 is an apocalyptic number.

1642320460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1642320460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1979510400).

1642320460 is an abundant number, since it is smaller than the sum of its proper divisors (2316700340).

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

1642320460 is a wasteful number, since it uses less digits than its factorization.

1642320460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4471 (or 4469 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1642320460 is about 40525.5531732757. The cubic root of 1642320460 is about 1179.8296364217.

The spelling of 1642320460 in words is "one billion, six hundred forty-two million, three hundred twenty thousand, four hundred sixty".