1642560220 has 48 divisors (see below), whose sum is σ = 3970552320. Its totient is φ = 559105344.

The previous prime is 1642560197. The next prime is 1642560223. The reversal of 1642560220 is 220652461.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642560223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22744 + ... + 61663.

It is an arithmetic number, because the mean of its divisors is an integer number (82719840).

Almost surely, 2^1642560220 is an apocalyptic number.

1642560220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1642560220 is an abundant number, since it is smaller than the sum of its proper divisors (2327992100).

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

1642560220 is a wasteful number, since it uses less digits than its factorization.

1642560220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84562 (or 84560 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1642560220 is about 40528.5111989079. The cubic root of 1642560220 is about 1179.8870475048.

The spelling of 1642560220 in words is "one billion, six hundred forty-two million, five hundred sixty thousand, two hundred twenty".