1646426420 has 24 divisors (see below), whose sum is σ = 3459126048. Its totient is φ = 658260000.

The previous prime is 1646426393. The next prime is 1646426423. The reversal of 1646426420 is 246246461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646426423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26735 + ... + 63305.

It is an arithmetic number, because the mean of its divisors is an integer number (144130252).

Almost surely, 2^1646426420 is an apocalyptic number.

1646426420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1646426420 is an abundant number, since it is smaller than the sum of its proper divisors (1812699628).

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

1646426420 is a wasteful number, since it uses less digits than its factorization.

1646426420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38831 (or 38829 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 1646426420 is about 40576.1804510972. The cubic root of 1646426420 is about 1180.8120475709.

The spelling of 1646426420 in words is "one billion, six hundred forty-six million, four hundred twenty-six thousand, four hundred twenty".