642333380 has 48 divisors (see below), whose sum is σ = 1529129280. Its totient is φ = 224684928.

The previous prime is 642333359. The next prime is 642333401. The reversal of 642333380 is 83333246.

It is an interprime number because it is at equal distance from previous prime (642333359) and next prime (642333401).

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, 60074 + ... + 69953.

It is an arithmetic number, because the mean of its divisors is an integer number (31856860).

Almost surely, 2^642333380 is an apocalyptic number.

It is an amenable number.

642333380 is an abundant number, since it is smaller than the sum of its proper divisors (886795900).

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

642333380 is a wasteful number, since it uses less digits than its factorization.

642333380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130068 (or 130066 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 642333380 is about 25344.2967943480. The cubic root of 642333380 is about 862.8199213666.

The spelling of 642333380 in words is "six hundred forty-two million, three hundred thirty-three thousand, three hundred eighty".