83428215 has 32 divisors (see below), whose sum is σ = 148720320. Its totient is φ = 39653376.

The previous prime is 83428211. The next prime is 83428237. The reversal of 83428215 is 51282438.

It is not a de Polignac number, because 83428215 - 2² = 83428211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83428211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1722 + ... + 13031.

It is an arithmetic number, because the mean of its divisors is an integer number (4647510).

Almost surely, 2^83428215 is an apocalyptic number.

83428215 is a deficient number, since it is larger than the sum of its proper divisors (65292105).

83428215 is a wasteful number, since it uses less digits than its factorization.

83428215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14803.

The product of its digits is 15360, while the sum is 33.

The square root of 83428215 is about 9133.9046962403. The cubic root of 83428215 is about 436.9559430334.

The spelling of 83428215 in words is "eighty-three million, four hundred twenty-eight thousand, two hundred fifteen".