83220642 has 32 divisors (see below), whose sum is σ = 185391360. Its totient is φ = 27671760.

The previous prime is 83220637. The next prime is 83220649. The reversal of 83220642 is 24602238.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (83220649) 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, 23223 + ... + 26565.

It is an arithmetic number, because the mean of its divisors is an integer number (5793480).

Almost surely, 2^83220642 is an apocalyptic number.

83220642 is an abundant number, since it is smaller than the sum of its proper divisors (102170718).

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

83220642 is a wasteful number, since it uses less digits than its factorization.

83220642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3815 (or 3809 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 83220642 is about 9122.5348450965. The cubic root of 83220642 is about 436.5932536556.

The spelling of 83220642 in words is "eighty-three million, two hundred twenty thousand, six hundred forty-two".