83928915 has 72 divisors (see below), whose sum is σ = 179262720. Its totient is φ = 36094464.

The previous prime is 83928907. The next prime is 83928919. The reversal of 83928915 is 51982938.

It is a happy number.

It is not a de Polignac number, because 83928915 - 2³ = 83928907 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (83928919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 36366 + ... + 38604.

It is an arithmetic number, because the mean of its divisors is an integer number (2489760).

Almost surely, 2^83928915 is an apocalyptic number.

83928915 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

83928915 is an abundant number, since it is smaller than the sum of its proper divisors (95333805).

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

83928915 is a wasteful number, since it uses less digits than its factorization.

83928915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281 (or 2271 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 83928915 is about 9161.2725644421. The cubic root of 83928915 is about 437.8283401884.

The spelling of 83928915 in words is "eighty-three million, nine hundred twenty-eight thousand, nine hundred fifteen".