642926622 has 32 divisors (see below), whose sum is σ = 1403746848. Its totient is φ = 195111936.

The previous prime is 642926597. The next prime is 642926629. The reversal of 642926622 is 226629246.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642926629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50763 + ... + 62150.

It is an arithmetic number, because the mean of its divisors is an integer number (43867089).

Almost surely, 2^642926622 is an apocalyptic number.

642926622 is an abundant number, since it is smaller than the sum of its proper divisors (760820226).

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

642926622 is a wasteful number, since it uses less digits than its factorization.

642926622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113004.

The product of its digits is 124416, while the sum is 39.

The square root of 642926622 is about 25355.9977520113. The cubic root of 642926622 is about 863.0854654658.

The spelling of 642926622 in words is "six hundred forty-two million, nine hundred twenty-six thousand, six hundred twenty-two".