83545638 has 16 divisors (see below), whose sum is σ = 182281536. Its totient is φ = 25316840.

The previous prime is 83545621. The next prime is 83545639. The reversal of 83545638 is 83654538.

It is a self number, because there is not a number n which added to its sum of digits gives 83545638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83545639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632856 + ... + 632987.

It is an arithmetic number, because the mean of its divisors is an integer number (11392596).

Almost surely, 2^83545638 is an apocalyptic number.

83545638 is an abundant number, since it is smaller than the sum of its proper divisors (98735898).

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

83545638 is a wasteful number, since it uses less digits than its factorization.

83545638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265859.

The product of its digits is 345600, while the sum is 42.

The square root of 83545638 is about 9140.3303003776. The cubic root of 83545638 is about 437.1608482309.

Subtracting 83545638 from its reverse (83654538), we obtain a square (108900 = 330²).

The spelling of 83545638 in words is "eighty-three million, five hundred forty-five thousand, six hundred thirty-eight".