83023640 has 48 divisors (see below), whose sum is σ = 217306800. Its totient is φ = 28464576.

The previous prime is 83023621. The next prime is 83023643. The reversal of 83023640 is 4632038.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83023643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19220 + ... + 23139.

It is an arithmetic number, because the mean of its divisors is an integer number (4527225).

Almost surely, 2^83023640 is an apocalyptic number.

It is an amenable number.

83023640 is an abundant number, since it is smaller than the sum of its proper divisors (134283160).

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

83023640 is a wasteful number, since it uses less digits than its factorization.

83023640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42384 (or 42373 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 83023640 is about 9111.7309003284. The cubic root of 83023640 is about 436.2484766082.

Adding to 83023640 its reverse (4632038), we get a palindrome (87655678).

The spelling of 83023640 in words is "eighty-three million, twenty-three thousand, six hundred forty".