646362426 has 16 divisors (see below), whose sum is σ = 1293473664. Its totient is φ = 215329344.

The previous prime is 646362421. The next prime is 646362433. The reversal of 646362426 is 624263646.

It is a happy number.

646362426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (646362421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19650 + ... + 40973.

It is an arithmetic number, because the mean of its divisors is an integer number (80842104).

Almost surely, 2^646362426 is an apocalyptic number.

646362426 is an abundant number, since it is smaller than the sum of its proper divisors (647111238).

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

646362426 is a wasteful number, since it uses less digits than its factorization.

646362426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62405.

The product of its digits is 248832, while the sum is 39.

The square root of 646362426 is about 25423.6587846832. The cubic root of 646362426 is about 864.6201796211.

The spelling of 646362426 in words is "six hundred forty-six million, three hundred sixty-two thousand, four hundred twenty-six".