642236476 has 48 divisors (see below), whose sum is σ = 1336769280. Its totient is φ = 264257280.

The previous prime is 642236467. The next prime is 642236501. The reversal of 642236476 is 674632246.

It is a super-2 number, since 2×642236476² = 824935382209797152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 66516 + ... + 75556.

It is an arithmetic number, because the mean of its divisors is an integer number (27849360).

Almost surely, 2^642236476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642236476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668384640).

642236476 is an abundant number, since it is smaller than the sum of its proper divisors (694532804).

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

642236476 is a wasteful number, since it uses less digits than its factorization.

642236476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9154 (or 9152 counting only the distinct ones).

The product of its digits is 290304, while the sum is 40.

The square root of 642236476 is about 25342.3849706376. The cubic root of 642236476 is about 862.7765301365.

The spelling of 642236476 in words is "six hundred forty-two million, two hundred thirty-six thousand, four hundred seventy-six".